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In between deep cleanings, you really only need to clean the filter, the drum, and the door. Run a sanitization cycle and then wipe down the exterior of the machine. You can skip cleaning the drain hose and the detergent tray, as these steps only need to happen once or twice a year, depending on how often you use your washing machine.

While the exact appearance of the filter will depend on your dishwasher brand, it often consists of a cylindrical or rectangular mesh or plastic component. The filter is located at the bottom of the dishwasher beneath the lower spray arm. It includes a combination of a coarse filter, which traps larger food particles, and a finer filter, which captures smaller debris. The filter assembly may be a single unit or a multi-part system that can be twisted or snapped out for cleaning.

To clean an old dishwasher without a filter, start by removing the bottom rack to access the drain area. Use a damp cloth or sponge to wipe down the interior, paying special attention to the corners and crevices where food particles and debris can build up. Pour a cup of white vinegar into a dishwasher-safe bowl and place it on the top rack, then run a hot water cycle to help break down grease and grime. After the cycle, sprinkle a cup of baking soda across the bottom of the dishwasher and run a short hot water cycle to deodorize and further clean the interior. 

Yes, if you’re strapped for supplies, boiling hot water can be a great alternative for getting rid of soap scum. However, as this method calls for a bit of soaking, it’s best used when cleaning your bathroom sink or bath basin (or on small objects you can submerge). All you have to do is plug your sink or bathtub drain and pour in enough boiling water to cover the soap scum. Allow it to soak for five minutes, drain, and follow up with an additional hot water rinse to remove any lingering residue.