How to Clean a Dishwasher: Complete Guide for Australians

A dishwasher cleans your dishes — but it also needs cleaning itself. Regular dishwasher maintenance prevents odours, keeps it running efficiently, and extends its lifespan. Here's a complete guide.

How Often to Clean a Dishwasher

• Filter: Clean once a month
• Spray arms: Clean every 2-3 months
• Interior and door seal: Clean once a month
• Full maintenance wash: Once a month

Step 1: Clean the Filter (Monthly)

Most modern dishwashers have a removable filter system at the bottom of the tub. This is where food particles collect.

1. Rotate and remove the filter assembly (check your manual — most twist counter-clockwise)
2. Rinse under warm running water
3. Use a soft brush (old toothbrush works well) to scrub away stubborn food particles
4. Rinse thoroughly and reinsert

A clogged filter is the number one cause of dishwasher odours and poor cleaning results.

Step 2: Clean the Spray Arms (Every 2-3 Months)

Spray arms can become blocked with mineral deposits and food particles, reducing wash performance.

1. Remove the spray arms (usually by unscrewing the central nut or simply lifting them off)
2. Use a toothpick to clear any blocked holes
3. Rinse under warm water
4. Reattach securely

Step 3: Clean the Door Seal

The rubber door seal traps food debris and moisture, becoming a source of mould and bacteria.

1. Use a damp cloth to wipe inside the seal folds
2. For mould, use a mild bleach solution (1 part bleach to 10 parts water)
3. Rinse thoroughly after cleaning with bleach

Step 4: Run a Maintenance Cycle

Once a month, run an empty dishwasher on the hottest setting with one of these cleaning methods:

Method 1: White Vinegar

1. Place a dishwasher-safe container on the top rack filled with 240ml (1 cup) of white vinegar
2. Run the hottest cycle (no detergent)
3. The vinegar dissolves grease, mineral deposits, and kills bacteria

Method 2: Bicarbonate of Soda

1. Sprinkle 1 cup of bicarbonate of soda on the bottom of the dishwasher
2. Run a short hot cycle
3. Deodorises and lifts stains from the interior

Method 3: Commercial Dishwasher Cleaner

Products like Finish Machine Cleaner are effective and simple to use. Follow the product instructions.

Preventing Dishwasher Problems

• Always use rinse aid — it prevents water spots and aids drying
• Keep salt levels topped up in areas with hard water
• Scrape food off plates before loading (don't need to pre-rinse, just scrape)
• Load correctly — don't block spray arm rotation

Find Quality Dishwashers at Oceania Appliances

If your dishwasher is old and despite cleaning isn't performing well, it may be time for an upgrade. Shop our range at oceaniaappliances.com.au. Free Sydney delivery.