How to Clean & Deep-Clean Your Dishwasher (+ Rinse Aid Explained)

A dishwasher deep clean takes about 30 minutes and should happen each 30 days, with the filter checked weekly. Between deep cleans, food scraps, grease, and hard-water minerals build up on the filter, spray arms, and gasket. The machine can look empty and clean between loads. The buildup is still there, hiding out of sight. It won't go away on its own.

Does your dishwasher smell musty? Does it leave cloudy film on glasses, or leave dishes damp? The fix is almost always the same three-part routine. Clear the filter, run a vinegar cycle, and add rinse aid. Below are the exact steps. You'll also learn how a Health Canada-backed clean cycle keeps your machine truly germ-free, not just clean-looking.

What's Actually Building Up Inside Your Dishwasher?

A dishwasher isn't self-cleaning. Each cycle pushes food bits, grease, and minerals through the filter. Some of it stays behind, load after load. In hard water areas, mineral scale also builds up on the walls and spray arm tips. That buildup blocks water flow. It also clouds glassware.

Left unchecked, a dirty filter and greasy gasket breed bacteria and mold. That's the usual cause of a musty dishwasher smell. At home, hot water can wash and kill germs on dishes at the same time, per Health Canada's food safety guidance. But that's only true if the machine itself is clean enough to do the job.

How to Clean Your Dishwasher Every Week (Quick Routine)

Weekly upkeep takes under five minutes. It stops most odor and performance problems before they start. Do these four things each week. Skip pre-rinsing plates? Do them every two months instead.

1. Remove and rinse the filter under hot water. Use an old toothbrush to knock loose any trapped food.

2. Check the spray arm tips for clogged holes. Clear them with a toothpick.

3. Wipe the door gasket, where grease and grime collect out of sight.

4. Wipe the outside control panel and door with a damp cloth.

This routine fits well into a broader weekly cleaning habit. Building a full-home routine? Our room-by-room house cleaning guide shows how to fit kitchen tasks like this one into the rest of the house.

How to Deep-Clean a Dishwasher With Vinegar (Step by Step)

Want a natural option, without harsh chemicals? Run a two-step vinegar and baking soda cycle once a month. White vinegar is a mild acid. It dissolves mineral scale and cuts through grease. Baking soda is mildly rough. It cancels out odors too.

1. Empty the dishwasher fully, including racks, the utensil basket, and the filter.

2. Rinse the filter on its own, under hot water, to clear trapped debris.

3. Place a dishwasher-safe bowl with 1 cup of white vinegar on the top rack.

4. Run a full hot cycle with no detergent. The vinegar breaks down scale and grease as it moves through.

5. Sprinkle 1/4 cup of baking soda across the bottom of the empty tub.

6. Run a second short hot cycle to cancel lingering odors and lift leftover stains.

One safety note: don't mix vinegar and baking soda in the same cycle. Run them back to back instead. Mixed together, the acid and base foam up. They give off carbon dioxide gas, and that gas can jam the spray arms. For extra cleaning power, pick your dishwasher's hottest, longest setting. Sustained heat is what kills bacteria, not the vinegar itself.

The same vinegar-first, baking-soda-second method works on other machines with mineral buildup too. See our guide to descaling a kettle for more.

What Is Rinse Aid, and Do You Actually Need It?

Rinse aid is a soapy liquid. It cuts water's surface tension. Water then sheets off dishes in a thin film. It doesn't bead into droplets. Thin sheets dry faster than droplets. That's why some dishwashers leave dishes bone-dry while others leave streaks and spots.

The dishwasher adds it during the final rinse. It comes from a small tank next to the detergent slot. Refill it every month or two, based on how often you run the machine. Rinse aid matters most in hard water areas. Mineral-heavy water leaves spots on glasses and forks without it. If your rinse-aid light has been on a while, that's your cue to refill it.

Methodology

This guide's cleaning schedule and vinegar-and-baking-soda method come from real sources. We used guides from Whirlpool and Maytag. We also used Health Canada's food-safety guidance on dishwasher cleaning. The advice assumes average household use. That keeps the tips grounded in fact, not guesswork. Scrape plates first, and you can stretch filter cleaning to about once a year. Skip pre-rinsing, and check the filter every two months instead.

When to Call a Pro

A monthly vinegar cycle handles routine upkeep. But some problems point to something broken. Watch for bad smells that won't go away, or standing water in the tub. Also watch for dishes that stay dirty even after you clean the filter. The likely cause is a clogged drain hose or worn spray arm part. That's outside a DIY fix. If your whole kitchen needs work, not just the dishwasher, it might be time for extra help. A professional deep cleaning service covers appliance outsides, cupboard fronts, and every other greasy surface.

Ezi connects you with vetted local service providers. They handle kitchen deep cleans on your schedule. Book a cleaning in a few taps and skip the scrubbing for good.

Keeping Your Dishwasher Working Like New

A clean dishwasher comes down to three habits. Rinse the filter weekly, run a vinegar-and-baking-soda cycle monthly, and keep rinse aid on hand. Skip all three for a few months and you'll notice it. First a smell, then spots on glasses, then a machine that just won't dry dishes anymore.

Stay on top of the routine. Your dishwasher will keep working well for years. Kitchen upkeep is one more thing on a long list. Our house cleaning services can take the rest of it off your plate.