10 Dishwasher Maintenance Tips to Extend Its Life

A well-maintained dishwasher lasts 10-15 years and cleans better throughout its life. These simple habits take minimal effort but make a real difference.

1. Clean the Filter Monthly

Most modern dishwashers have a manual filter at the bottom of the tub. Food particles, grease, and debris collect here. A clogged filter reduces cleaning performance and can cause odors.

To clean it:

• Remove the bottom rack
• Twist and lift out the filter assembly
• Rinse under hot water with a soft brush
• Replace and twist to lock

This takes 2 minutes and is the single most impactful maintenance task.

2. Run a Cleaning Cycle Monthly

Run an empty cycle on the hottest setting with a dishwasher cleaner or 2 cups of white vinegar placed in a bowl on the top rack. This removes grease buildup, mineral deposits, and odor-causing bacteria.

3. Clean the Spray Arms

Spray arm holes can get clogged with food particles or mineral deposits. Remove each spray arm (they usually twist off) and use a toothpick to clear blocked holes. Rinse under running water.

Do this every 3-6 months.

4. Wipe the Door Gasket

The rubber seal around the door traps food particles and moisture, leading to mold and odors. Wipe it down with a damp cloth every week or two.

Pay special attention to the bottom of the door where water and debris accumulate.

5. Check and Clean the Drain

The drain area at the bottom of the tub can accumulate glass shards, bones, and other hard debris. Check it monthly and remove anything you find.

6. Use the Right Detergent

Too much detergent leaves residue on dishes and inside the machine. Too little means poor cleaning. Follow the manufacturer's recommendation and adjust based on your water hardness.

Tip: If you see white film on glasses, you're using too much detergent or your water is very hard. Try reducing detergent and adding rinse aid.

7. Use Rinse Aid

Rinse aid isn't optional. It helps water sheet off dishes during the rinse cycle, preventing spots and improving drying. Most dishwashers have a rinse aid dispenser that you fill every few weeks.

8. Load Dishes Correctly

Improper loading is the number one cause of poor cleaning:

• Face dishes inward toward the spray arms
• Don't nest bowls or cups together
• Place large items around the edges, not blocking the spray arm
• Keep the center of the bottom rack clear for the spray arm to spin freely
• Put glasses and delicate items on the top rack

9. Run Hot Water Before Starting

Before starting a cycle, run your kitchen faucet until the water is hot. This ensures the dishwasher starts with hot water immediately rather than waiting for the cold water in the pipes to flush through.

10. Leave the Door Ajar After Cycles

After a cycle completes, crack the door open an inch to let steam escape. This prevents moisture from sitting in the tub, which reduces odors and mold growth.

Some newer models have auto-open door features that do this automatically.

When to Call a Professional

Most maintenance is DIY, but call a professional if you notice:

• Water leaking from under the door
• Unusual grinding or loud clicking noises
• Dishes coming out with a gritty film that doesn't improve with cleaning
• The dishwasher won't drain completely
• Error codes on the display

FAQ

How often should I clean my dishwasher?

Clean the filter monthly, run a cleaning cycle monthly, and clean spray arms every 3-6 months. Wipe the door gasket weekly.

Can I use vinegar instead of commercial dishwasher cleaner?

Yes. Place 2 cups of white vinegar in a bowl on the top rack and run a hot cycle. It removes grease and mineral buildup effectively.

Why does my dishwasher smell bad?

Usually a dirty filter, clogged drain, or mold on the door gasket. Clean all three and run a hot cycle with vinegar. If the smell persists, check the drain hose for blockage.