Do You Really Need to Pre-Rinse Your Dishes? Here's What the Experts Say

Pre-rinsing is one of those inherited household habits that you may instinctually do without much thought—but does it really make a difference in the cleanliness of your dishes? Today's dishwashers are more powerful than earlier eras of appliances, so is the extra step still necessary? "Pre-rinsing is largely an outdated habit with modern dishwashers," shares Carolina McCauley, who regularly shares her cleaning expertise to an audience of over 3 million followers.

According to cleaning experts like McCauley, the most efficient, effective approach actually skips the pre-rinse. Here's why—and the better way to load the dishwasher.

Why You Should Skip the Pre-Rinse

Your dishwasher is engineered to do the heavy lifting, and modern detergents are formulated with that in mind. "Modern dishwashers do not require pre-rinsing, but do I understand why the habit stuck!" says professional cleaner Claire Helen, founder of SisterPledgeCleans.

"Early dishwashers were not as effective as they are today. Modern machines are rigorously tested and designed with sensors that cleverly detect how dirty your dishes are and adjust the cycle accordingly," she explains. "Simply scrape off food scraps and load the dishwasher properly. Trust the process! Let it do the job it was designed to do."

It seems counterintuitive, but a quick rinse can interfere with two key things: your dishwasher’s sensors and your detergent's performance.

Your Dishwasher May Run a Lighter Cycle

"When dishes are pre-rinsed until they are nearly spotless, the dishwasher sensors may not run a full cycle because they detect less soil," says Cindy Hendler, a cleaning expert with 30 years of experience.

This means the machine "may interpret dishes as being cleaner than they actually are," adds McCauley, "and reduce washing intensity."

Your Detergent May Not Perform As Well

Some detergents actually clean better when there’s a small amount of food residue present. "Dishwasher detergents are designed to bind to food particles during the cleaning process," says McCauley. "Without some soil present, they may not work as effectively, which can lead to dull glassware or residue."

The Water Waste Factor

Even if your dishes do come out clean after pre-rinsing, experts point out that it’s not the most efficient way to get there. "Pre-rinsing wastes water and reduces efficiency because you are effectively washing twice," Helen says. Your dishwasher is meant to replace most of the work, not add to it.

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What to Do Instead

If pre-rinsing is out, what’s the best approach? "Scrape the food off, load the dishwasher properly, and let the machine do what it was designed to do," Hendler says. "The best results come when people trust their dishwasher and keep it clean rather than doing half the job by hand first."

When in doubt, remove any large chunks of food, bone, and pits, but let the dishwasher handle the sauces, residue, and normal "used dish" mess.

If Your Dishes Aren't Coming Out Clean

If you aren't met with clean dishes after a dishwasher cycle, the fix is rarely to rinse more; it's proper maintenance, according to our experts. "If your dishwasher is not getting dishes clean, it is just as important to keep the filter and spray arms clean so the water and detergent can do their job," Hendler says. "Even older machines can perform well when they are properly maintained and paired with a quality detergent."

Before resigning yourself to rinsing everything by hand, clean the filter, check the spray arms, and make sure you’re using a detergent that's suitable for your machine and cooking habits. "The most important maintenance step is keeping your filter clean," says Helen. "I always say if you clean the things that clean for you, they will look after you. A quick rinse of the filter between cycles makes far more difference than pre-rinsing every plate."