How to Clean Your Dishwasher Properly (Step-by-Step)

Even though your dishwasher is designed to clean, it needs cleaning too. Over time, leftover food, grease, soap scum, and limescale can build up inside — leaving you with bad smells, cloudy glasses, and poor performance.

Luckily, it only takes a few simple steps to get your dishwasher sparkling clean again.

How Often Should You Clean Your Dishwasher?

For best results:

• Quick clean: Once a week (wipe door seals, empty filter)

• Deep clean: Once a month (clean filter, spray arms, run a cleaning cycle)

• Descale: Every 3 months if you're in a hard water area

Step-by-Step: How to Clean Your Dishwasher

1. Empty the Dishwasher

Make sure the appliance is completely empty — no dishes, cutlery, or food bits.

2. Clean the Filter

Remove the bottom rack and take out the filter (usually located at the base). Rinse it under warm water and scrub with a soft brush to remove food residue.

A clogged filter is one of the main reasons dishwashers stop cleaning properly.

3. Check and Clean the Spray Arms

Remove the spray arms if possible. Check the holes for blockages — food particles or limescale can build up. Use a cocktail stick or toothpick to gently poke out any debris, then rinse under warm water.

4. Wipe the Door Seals and Edges

Food and grime often collect around the door and rubber seals. Use a damp cloth or sponge with warm soapy water to wipe around the edges and the seals.

Don't forget to clean the bottom lip of the door — a spot that’s often missed.

5. Run a Cleaning Cycle with Vinegar or Dishwasher Cleaner

Place a dishwasher-safe bowl or mug filled with white vinegar on the top rack (or use a shop-bought dishwasher cleaning tablet in the detergent compartment).

Run a hot cycle (60°C or higher). This helps break down grease, odours, and residue throughout the machine.

6. Optional: Sprinkle Bicarbonate of Soda

After the vinegar cycle, you can sprinkle a cup of bicarbonate of soda in the base of the dishwasher and run a short hot cycle. This removes lingering odours and freshens things up.

Descaling Your Dishwasher (for Hard Water Areas)

If you live in a hard water area, limescale can build up fast. Use a dishwasher descaler every 2–3 months to keep things running efficiently.

Just follow the instructions on the packaging — most are used on an empty machine during a hot cycle.

Extra Tips for a Cleaner Dishwasher

• Scrape, don’t rinse: Remove large food bits before loading — modern dishwashers are designed for lightly soiled plates

• Use rinse aid: Helps prevent cloudy glasses and streaky finishes

• Leave the door slightly open after each wash: Helps dry the interior and prevents mould

• Don’t overload: It blocks water flow and leads to poor results

• Run hot washes regularly: Prevents grease build-up if you usually use eco settings

Final Thought

Cleaning your dishwasher is quick, easy, and essential for keeping it working at its best. With just a bit of regular maintenance — cleaning the filter, wiping seals, and running a hot cycle with vinegar or a cleaner — you’ll keep your appliance fresh, efficient, and ready to tackle even the dirtiest dishes.