Dishwasher

Why Does My Dishwasher Smell Bad?

A dishwasher that leaves your kitchen smelling worse than before you ran it usually has something sitting inside it that shouldn't be there. The good news: most causes are cleanable, not repairable.

Check the Filter First

Trapped food debris in the filter is the most common cause by far. Most dishwashers have a removable filter at the bottom of the tub that needs to be pulled out and rinsed by hand every so often — it doesn't clean itself just because the dishes come out looking fine. If you can't remember the last time you rinsed it, that's a good place to start.

Other Common Sources

A clogged drain hose can develop a smell over time as residue builds up inside it where you can't see it. Hard water and soap scum can also build up inside the spray arm holes, leaving a musty smell even after a full cycle. And standing water sitting in the tub between uses is worth noting on its own — that's less a smell issue and more a sign the dishwasher isn't draining fully.

A Simple Habit That Prevents Most of This

Running a hot, empty cycle with a dishwasher cleaner, or even just a cup of white vinegar, about once a month keeps buildup from accumulating in the filter and spray arms in the first place. It's a small habit that heads off most of the causes above.

When It's More Than a Cleaning Issue

If the filter is clean and the smell keeps coming back, especially alongside any standing water at the bottom of the tub, the drain path likely needs a closer look rather than another cleaning cycle.

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