Dishwasher Not Cleaning Dishes Properly? 5 Things to Check

Quick answer: Dishes coming out cloudy, greasy or still dirty usually comes down to one of five things: no rinse aid, a blocked filter, hard water build-up, dishes blocking the spray arms, or water that isn’t running hot enough. None of them mean the dishwasher itself is broken — all are worth checking before booking a repair.

1. Check the rinse aid

Rinse aid is what stops water beading and drying into cloudy spots on glasses and cutlery — without it, even a perfectly working dishwasher leaves dishes looking dull. Check the dispenser is topped up and the cap is clicked shut properly, not just sitting loosely on top.

2. Check the filter

Most dishwashers have a removable filter at the bottom of the tub that needs clearing out every few weeks. A filter clogged with food scraps restricts water flow to the spray arms, leaving dishes only partially cleaned. Pull it out, rinse it under a tap, and refit it firmly.

3. Check for hard water build-up

A cloudy film that won’t wipe off (as opposed to spots that do) is usually limescale from hard water rather than a cleaning fault. Run an empty cycle with a cup of white vinegar in the bottom of the tub — if the film noticeably improves, hard water build-up is the cause, not the machine.

4. Check you’re not blocking the spray arms

Large plates, trays or overcrowded racks can physically block the spray arms from reaching every dish, or stop the arms spinning freely. Load with soiled sides facing inward, and spin each spray arm by hand before starting a cycle to make sure nothing’s in its way.

5. Check the water is running hot enough

Dishwasher detergent needs genuinely hot water to dissolve and work properly — if the kitchen tap runs lukewarm before it heats up, the dishwasher may be starting its cycle before hot water reaches it. Run the kitchen sink tap until it’s hot immediately before starting the dishwasher to help.

When it’s a job for a technician

If you’ve topped up rinse aid, cleared the filter, ruled out hard water and checked loading but dishes are still coming out dirty, it’s likely a spray arm, wash pump or heating fault that needs a proper diagnosis. Our dishwasher repair technicians in Hobart, Indiana diagnose the fault with upfront pricing before any work begins.

Most “my dishwasher stopped cleaning properly” calls turn out to be maintenance, not a mechanical fault — a five-minute filter clean fixes more of these than people expect.

Frequently Asked Questions

Why are my glasses coming out of the dishwasher cloudy?

This is almost always missing rinse aid or hard water mineral build-up, not a fault with the dishwasher. Top up the rinse aid first, then try the vinegar rinse test if the cloudiness doesn’t clear.

Is hard water build-up something a technician needs to fix?

No — it’s a water-quality issue, not a mechanical fault, and usually clears with regular vinegar rinses or a rinse-aid dose increase. A technician is only needed if dishes stay dirty after ruling out rinse aid, hard water and a blocked filter.

How much does dishwasher repair cost in Hobart, Indiana?

It depends on the fault — most cleaning issues are maintenance, not a paid repair. Where a repair is needed, a spray arm fix costs far less than a wash pump replacement. See our appliance repair cost guide for what typically affects the price, or we’ll diagnose and quote upfront before any work starts.

Still not cleaning properly after checking the above? Book a technician online — we repair dishwashers right across Hobart, Indiana. You might also find our guide on what to check if your dishwasher isn’t draining useful.

Want to avoid a repeat call-out? See our maintenance checklist for Hobart, Indiana homeowners.