How to Use Dishwasher Cleaner | Step-by-Step Instructions

A clean dishwasher actually cleans your dishes. Mineral deposits, grease, and food residue build up over time and make the machine less effective — and that’s when odors start. Running a dedicated dishwasher cleaner once a month keeps the interior fresh and the spray arms working at full pressure. Whether you grab a tablet or a liquid bottle, the method is simple and takes about five minutes of hands-on time.

How to Use Dishwasher Cleaner Tablets

Tablets are the most common format and the easiest to use. Place one tablet in the detergent dispenser and close the lid. If you have heavy buildup, use a second tablet placed on the bottom rack of the empty dishwasher — the dispenser tablet tackles the wash chamber and the rack tablet handles the sump area and drain. Run a Normal Wash Cycle at the hottest available temperature. Do not add any regular detergent or pods.

Tablets also work during a load of dishes if you put the tablet on the bottom rack instead of the dispenser — the dispenser needs regular detergent for a combined load. But for the deepest clean, run the cycle empty.

How to Use Liquid Dishwasher Cleaner Bottles

Liquid bottles use a wax plug that releases during the hot cycle. Remove the sticker from the cap to expose the wax plug — do not unscrew the cap. Place the bottle upside down on the bottom rack or in the cutlery basket so water flows directly into the cap opening. Run a cycle at 60°C (140°F) or the hottest setting your dishwasher offers. After the cycle ends, discard the empty bottle (it’s recyclable).

Like tablets, liquid cleaners work best on an empty machine without any added detergent. The wax plug dissolves at high temperatures, so a cool or short cycle won’t release the cleaner properly.

DIY Alternatives: Vinegar and Baking Soda

White vinegar and baking soda can replace commercial cleaners in a pinch, especially for light maintenance between deep cleans. For a vinegar cycle, fill a dishwasher-safe glass or bowl with 2 cups of white vinegar and place it on the bottom or top rack. Run a complete regular cycle — but turn off the heated dry option (use air-dry or energy-saving dry instead) to avoid vinegar fumes and potential damage to the machine. For a baking soda cycle, sprinkle 1 cup along the bottom of the empty dishwasher and run a short, hot-water cycle. Baking soda can follow a vinegar cycle to deodorize the interior, but never mix the two in the same cycle.

For a comprehensive deep clean, try our tested product recommendations in our guide to the best dishwasher cleaners that handle months of accumulated residue.

Common Mistakes to Avoid

Three easy errors ruin a cleaner cycle. First, running with dishes while using a tablet in the dispenser — the dispenser needs regular detergent for combined loads, so place the tablet on the bottom rack instead. Second, ignoring the filter: standing water or poor drainage after a cleaning cycle usually means the filter is clogged. Remove and clean the filter according to your owner’s manual after every cleaner run. Third, using cold or low-heat cycles — dishwasher cleaners require hot water to activate, so choose the hottest wash setting available. Also avoid unscrewing liquid cleaner caps (the wax plug won’t release) and loading dishes that block the spray arm from spinning freely.

References & Sources

• Affresh. “How to Use Dishwasher Cleaner on Smelly Dishwasher” Guidance on tablet and liquid cleaner application.
• KitchenAid. “How to Clean a Dishwasher” Official cleaning instructions including DIY methods.
• Maytag. “How to Deep Clean Dishwasher” Step-by-step deep cleaning procedures and frequency recommendations.