One of the Most Common Causes of Dishwasher Decline Is Completely Avoidable


If the glasses, plates and bowls you pull from the dishwasher rack post-cycle look barely any better than when you stuck them in, it could be the filter causing the problem.

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Your dishwasher’s filter quietly does some heavy lifting, trapping loose food particles to keep them out of that circulating wash water. If it’s clean and installed properly, it means less need to pre-rinse dishes and a better chance that they come out sparkling. 

Even with a filter, it’s still a good idea to scrape larger food scraps into the trash, but its job is straightforward and makes dishwashers more efficient than they were in the pre-filter era.

When compiling and analyzing our list of the best dishwashers, every expert I spoke with said that one of the most common causes for dishwasher repair calls and warranty claims is failing to clean the filter. 

So, how often should you clean your dishwasher filter? It’s more important than most people realize. Let’s explore why your filter matters, how often you should clean it and the best way to clean it.

Your dishwasher filter matters. Here’s why

person holding dishwasher filter in hand

A dirty filter could be causing your dishwasher to underperform. 

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An effective dishwasher filter has three benefits: It keeps the water cleaner, protects the water pump and prevents food debris from clogging spray nozzles and drainage lines. As a result, the dishwasher requires less effort to run, and you’ll eliminate wildcards that can damage your expensive kitchen appliance.

In contrast, my ancient Maytag PDC3600AWX portable dishwasher lacks any sort of filter. This means I need to be very diligent about scraping and pre-cleaning when loading to keep it running smoothly.

How to clean your dishwasher filter

person removing dishwasher filter

The filter is your dishwasher’s secret weapon.

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Even if you regularly run a self-clean cycle on your dishwasher with a product like Affresh, solid food debris won’t disappear unless you empty the filter. Here’s a quick guide to cleaning your dishwasher filter.

  1. Pull out the lower rack to access the filter assembly at the bottom of your dishwasher. You may also need to move the wash arm slightly to access the filter.
  2. Rotate the filter to unlock it before removing it. Keep in mind that your filter might have two parts: an inner cylindrical filter and a flat outer screen. You should clean both of these.
  3. Rinse the filter with clean water in your kitchen sink. If food debris and hard water remain, you may need to scrub with a soft brush (abrasive scrubbing can damage the filter mesh) and soapy water.
  4. Some brands suggest drying the filter assembly before putting it back in your dishwasher. However, you should be fine reinstalling it before it’s dry, as the lingering moisture is unlikely to cause issues for a product that constantly deals with water and dishwashing chemicals.
  5. Don’t forget to turn the filter to lock everything back in place.

How often should you clean your dishwasher filter?

person putting wine glass in dishwasher

Keep things simple by scraping your dishes before loading and setting a monthly cleaning schedule.

aire images/Getty Images

In the absence of unified manufacturer guidance, I recommend checking your dishwasher filter at least once a month. If it’s clean, your job is already done. If not, then it’s time to clean it.

Best of all, it’s as easy as putting a reminder on your phone, calendar or chore wheel to check and clean the dishwasher filter. However, you should also stay on top of any decline in performance or foul odors in your dishwasher, which might mean it’s time to clean the filter ahead of schedule.

You can also simplify the scheduling (and cleaning) process by always scraping food scraps into the trash. This one habit easily turns filter cleaning into a monthly task at most — even with two daily wash cycles — rather than something to dread twice a week without any scraping.

For context, some brands provide detailed filter cleaning schedules based on how often you run your dishwasher and how much you pre-clean (scraping and rinsing) dishes before loading. Scraping is easily the deciding factor in preventing frequent filter clogs.

LG Dishwasher Cleaning Schedule

It’s far easier to scrape your dishes than to figure out a complex schedule like this one from LG. Also, pre-washing your dishes before loading isn’t an efficient use of water.

John Carlsen/CNET

Normally, I’d defer to manufacturers on how often to clean your dishwasher filter, but the advice in the user manuals for our best dishwasher picks is inconsistent. For example, Bosch (PDF) and LG recommend checking and cleaning filters after every dishwashing cycle. In contrast, brands like Samsung (PDF), Midea (PDF), KitchenAid (PDF) and Frigidaire (PDF) give vague instructions about cleaning periodically or as needed.

Close-up hand filling dishwasher with gloss liquid into the dishwasher box.

Always remember to reinstall your dishwasher filter after cleaning it — you shouldn’t run any dishwashing cycles without it.

Miguel Tamayo Diaz/Getty Images

Even companies like Whirlpool (PDF) and Maytag (PDF), which recommend cleaning your dishwasher filter every one to three months, muddy the waters by stating that the frequency depends on your usage. I mean, technically, they’re not wrong. Someone like me, who uses a dishwasher once a week, may not need to clean the filter more than once every few months, compared to busy households that run multiple loads daily.

Even with a relatively dirty dishwasher filter, you’re unlikely to need more than 10 minutes to finish the cleaning process. Now you can enjoy a fresher, more effective dishwasher.





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When taxpayers weave together various tax rules to produce a favorable outcome, the IRS will often cite various judicial doctrines to avoid the result or to unwind the transaction. This can include economic substance, the step transaction doctrine, etc. These doctrines allow the IRS to effectively reverse the tax treatment of transactions when multiple tax rules are read together to produce a favorable tax outcomes.

The IRS often engages in the very similar conduct with how it interprets and uses our tax laws. This often arises during IRS audits and in tax litigation when the IRS strategically applies multiple rules to produce a favorable outcome. This raises questions about fairness and the balance of power in tax disputes.

The IRS already has the upper hand in tax litigation–from the burden of proof being on the taxpayer to other presumptions that are IRS-favorable. Given these advantages, is it acceptable for the government to craft legal strategies that weave through various complex tax provisions during the course of the tax litigation after the IRS audit has closed or even during an IRS audit?

How far should the IRS be able to go in crafting a strategy that navigates through various tax laws to produce a higher amount of tax? How many steps should the IRS be allowed to take during the course of litigation or on audit? Should the IRS be able to make arguments that apply multiple steps or even take up alternative positions during audits or litigation? Should there be a judicial doctrine, similar to the ones that apply to taxpayers who engage in tax planning, that prevents the IRS from this type of multiple-step or multi-rule strategy?

The recent case of Scenic Trust v. Commissioner, T.C. Memo. 2024-85, provides an opportunity to consider these questions. This case involves a taxpayer who apparently reported all of their income, yet the IRS asserted fraud and developed a multi-step backup plan in the litigation to ensure that the IRS would succeed in increasing the amount of tax owed.

Facts & Procedural History

The case involves a taxpayer who owned a direct-mail subscription business. The business consisted of several related entities, including a trust (the taxpayer trust) and other legal entities.

For the tax years 2012 and 2013, tax returns were filed for the taxpayer, the trust, and related entities. The IRS subsequently initiated an audit of these returns. During the IRS audit, the taxpayer and related entities provided extensive records to the IRS, including:

  1. Organizational documents
  2. Accounting records (including QuickBooks files with general ledgers)
  3. Bank statements and records
  4. Tax returns for various related entities
  5. Balance sheets and receipts

The IRS auditor argued that some of the documents provided by the taxpayer to the IRS were altered or backdated. These included:

  1. A consulting agreement between two of the entities
  2. The trust’s trust agreement
  3. A private annuity agreement between the trust and the taxpayer
  4. Multiple versions of a unit purchase agreement between the trust and the taxpayer, with differing terms

More than three years after the filing of the tax returns for these periods (which is significant due to the general three-year statute of limitations for tax assessments under I.R.C. § 6501(a)), the IRS issued Notices of Deficiency to the taxpayer and the trust for 2012 and 2013. These notices asserted additional tax owed and imposed civil fraud penalties under I.R.C. § 6663.

The case eventually made its way to the U.S. Tax Court. The IRS attorney set a preliminary hearing with the court specifically on the question of whether the taxpayer’s 2013 return was signed by him or by someone authorized to sign on his behalf. This hearing resulted in a written court opinion (Parducci v. Commissioner, T.C. Memo. 2023-75) in which the tax court concluded that the 2013 return was not validly signed.

The tax court opinion we’re primarily discussing in this article is the subsequent decision that disposed of the remaining issues in the case. To fully understand the significance of this opinion and the IRS’s litigation strategy, we need to start with the rules governing tax assessments.

About the IRS Assessment Period

The tax assessment rules are set out in Section 6501 of the tax code. These rules provide a time period within which the IRS can determine and record additional tax liabilities for taxpayers. These rules define the temporal boundaries of the IRS’s authority to assess taxes. Put another way, these rules limit the time the IRS has to conduct an audit and to tell taxpayers that they owe more in taxes.

Section 6501(a) establishes the general rule: the IRS must assess tax within three years after a return is filed. This three-year period is designed to balance the IRS’s need for adequate time to investigate and audit returns with taxpayers’ right to finality and closure of their tax affairs.

Congress also enacted several exceptions to this general rule, allowing for extended assessment periods in specific circumstances. This includes rules for the following situations:

  1. Six-Year Period (Section 6501(e)): For substantial omissions of gross income (generally exceeding 25% of the amount stated in the return).
  2. Unlimited Period (Section 6501(c)):
    a. When no return is filed (Section 6501(c)(3)) (which does not apply to some taxes, and can apply if the taxpayer files the wrong tax form)
    b. In cases of tax fraud (Section 6501(c)(1))
    c. For willful attempts to evade tax (Section 6501(c)(2))

These exceptions are at the heart of the dispute in this case.

The IRS’s Multi-Step Arguments

In the case, the IRS issued its notice of deficiency after the standard three-year audit period had expired. To justify this late assessment, the IRS invoked the fraud exception, even going so far as to assert civil tax fraud penalties under Section 6663. So the IRS could prevail if it could show that the taxpayer committed tax fraud.

While fraud extends the statute and allows the IRS to conduct a late audit and make a late-assessment, so too would an unfiled tax return. So the IRS could also prevail by showing that there was an unfiled tax return.

But there was another factor at play in this case. The taxpayer had a loss from another business for this year. Thus, even if the IRS was to prevail on fraud or no return filed issues and the IRS was able to assess additional tax, the taxpayer could still use his unrelated tax loss to offset or minimize the amount of tax. So the IRS could also prevail by finding a way to argue that the tax loss was not allowable or useable. This brings us to the IRS’s multi-step arguments in this case.

The IRS’s Plan A: A Fraud Extension

The IRS’s first plan was to argue that the taxpayer committed tax fraud and therefore there was no limitation on the statute for assessing tax for 2012 or for 2013.

The tax court opinion addresses the rules for civil tax fraud. As noted by the tax court, to invoke the fraud exception and keep the assessment period open indefinitely, the IRS bears the burden of proving, by clear and convincing evidence, that the taxpayer filed a false or fraudulent return with intent to evade tax (Section 7454(a)). This is a higher standard than the usual preponderance of evidence required in civil tax cases (but the courts have also said that even the tax preparers fraud counts).

Courts have developed a set of “badges of fraud” as circumstantial evidence of fraudulent intent. These so-called “badges” include:

  1. Understating income
  2. Maintaining inadequate records
  3. Failing to file tax returns
  4. Giving implausible or inconsistent explanations
  5. Concealing assets
  6. Failing to cooperate with tax authorities
  7. Engaging in illegal activities
  8. Attempting to conceal illegal activities
  9. Dealing in cash
  10. Failing to make estimated tax payments

In this case, the tax court analyzed these factors. While the tax court noted that some factors were present, such as the taxpayer’s lack of credibility in testimony and an intent to mislead inferred from a pattern of conduct (particularly the presentation of altered documents), most factors were found to be neutral or weighing against a finding of fraud.

The tax court emphasized that the taxpayer had reported all of their income and cooperated with the IRS during the audit. This cooperation, combined with the absence of most badges of fraud, led the tax court to conclude that the IRS had not met its burden of proving fraud by clear and convincing evidence.

So the IRS’s Plan A failed. Likely in anticipation of this holding, the IRS had another plan in the works.

The IRS’s Plan B1: Unfiled Tax Return

Anticipating the possibility that fraud might not be established, the IRS had prepared a backup strategy involving the unfiled tax return rules.

While fraud extends the statute and allows the IRS to conduct a late audit and make a late-assessment, so too would an unfiled tax return. The IRS attorney set this very issue for a hearing with the court as to whether there was a tax return that was filed. This approach created what could be viewed as a win-win situation for the IRS:

  1. If the tax court found no valid return was filed, the IRS would have an unlimited period to assess tax for 2013 under Section 6501(c)(3).
  2. If the tax court found a return was filed but was fraudulent, the IRS would have an unlimited period to assess tax under Section 6501(c)(1).

The tax court considered this issue and determined that the taxpayer did not sign their 2013 tax return. As such, there was no tax return on file for this year. While this position avoided a finding of fraud for 2013, it also resulted in the IRS having an unlimited statute to assess additional tax for this period.

So the IRS’s Plan B1 worked.

The IRS’s Plan B2: Assignment of Income Rules

Perhaps envisioning that the tax court might not find fraud, but might find that there was an unfiled tax return, the IRS also added a tack on argument to its position. This argument involves the assignment of income doctrine.

This doctrine, rooted in the Supreme Court’s decision in Lucas v. Earl, 281 U.S. 111 (1930), holds that income is taxed to the person who earns it, regardless of who ultimately receives it. The doctrine prevents taxpayers from avoiding tax by assigning their income to other persons or entities. It has been expanded over the years to cover various scenarios, including:

  1. Anticipatory assignments of income
  2. Income from personal services
  3. Income from property

In this case, the IRS attorney argued that even if the assessment period had closed for the trust’s 2013 return as the trust filed its 2013 tax return, the income should have been reported by the individual taxpayer personally. Since the taxpayer hadn’t filed a valid 2013 return for himself (as determined in the tax court in its earlier decision in this case), the assessment period for 2013 remained open indefinitely and given the assignment of income doctrine, the income could be assessed against the taxpayer individually.

The tax court agreed with the IRS on this point. It applied the assignment of income doctrine to shift the income from the trust and entities to the individual taxpayer for the open 2013 year. The tax court based this decision on its finding that the taxpayer had full control over these entities, despite the formal ownership structures.

Thus, the IRS’s Plan B2 worked.

The IRS’s Plan B3: The Passive Activity Loss Rules

Perhaps envisioning that the tax court might not find fraud, but might find that there was an unfiled tax return and might agree with the IRS on its assignment of income argument, the IRS added another argument to its position. This one involved the passive activity loss rules.

As noted above, the taxpayer had a loss from an unrelated entity reported on his tax return. Thus, even if the IRS prevailed in the arguments above and the taxpayer’s tax increased, he would have been able to offset the tax increase with his existing and unrelated tax loss.

The passive activity loss rules generally say that one cannot offset certain passive losses with certain types of income from non-passive activities. This is set out in Section 469. Section 469 was intended to prevent taxpayers from using losses from passive activities (such as limited partnerships or rental activities) to offset non-passive income (such as wages or portfolio income). The IRS argued in this case that if income was shifted to the taxpayer’s personal return, his ability to offset this income with losses from related entities should be limited under the passive activity loss rules.

The IRS contended that the losses from the taxpayer’s related entities were subject to these passive activity loss limitations. To deduct these losses against the newly attributed income, the taxpayer would need to establish material participation in the activities.

The tax court agreed with the IRS on this point as well. The tax court found that the taxpayer failed to provide sufficient evidence of material participation in the related entities. This decision effectively increased the taxpayer’s taxable income for the open year by preventing him from offsetting the increased income (resulting from the assignment of income doctrine) with losses from other businesses that were reported on his tax return.

Thus, the IRS’s Plan B3 worked.

Takeaway

As in shown by this case, the IRS can often employ a series of interconnected arguments developed during the litigation process, each serving as a backup to the others, to find a path that results in the highest amount of tax due. This case shows how the IRS can use the tax litigation process to effectively do what taxpayers are barred from doing when they engage in tax planning. Had a taxpayer engaged in a transaction that charted a course through rules like this, the IRS would no doubt have tried to unwinde it using various judicial doctrines. There is no comparable judicial doctrine, such as a government step transaction doctrine, that applies to the IRS and how it chooses to litigate cases.

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