How Do I Troubleshoot a Bosch Dishwasher that's Not Cleaning Properly?

Updated November 21, 2016

A Bosch dishwasher can ease the burden of cleaning dirty dishes or cookware unless your dishwasher has stopped working properly. If you start to notice bits of food or grease spots on your dishes after running the wash cycle, try to locate the problem as soon as possible. A clogged spray arm or dirty filter is easy to fix but if you ignore the problem, it could eventually lead to more extensive damage and require professional help.

Reach into the dishwasher and gently spin the upper and lower spray arms with your hand. The arms should spin easily, but if anything is blocking them, such as incorrectly loaded dishes, they will not clean effectively.

Look at the tiny holes located on the spray arms to see if they are clogged with food, grease or limescale deposits.

Remove all dishes from the dishwasher, add detergent to the appliance and run your Bosch dishwasher on the Power Scrub cycle. This will clean the spray arms.

Avoid overcrowding when you load dirty dishes into your Bosch dishwasher. The water from the spray arms must reach all areas of the dishes; if you place two dishes tightly together, the water cannot clean between them.

Clean the filter of your Bosch dishwasher to remove any trapped food or other debris. Turn the filter container, located right in front of the lower spray arm, counter-clockwise to unscrew it from the dishwasher. Rinse the filters in cool, running water to remove all visible debris and return them to the dishwasher.

Use only 1 tbsp of dishwasher detergent in your Bosch dishwasher. Increase this amount by approximately 1/2 tbsp each cycle until you find the correct amount of dishwasher detergent required to get your dishes clean.

Add a rinse agent if your dishes have streaks or spots. The rinse agent dispenser is located next to the detergent dispenser.


Do not use hand dish detergents in your Bosch dishwasher because they could damage the appliance.

Things You'll Need

  • Detergent
  • Water
  • Rinse agent
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About the Author

Kittie McCoy has been a freelance writer since 2008. She is also a part-time personal trainer and licensed entertainer in Las Vegas. She enjoys sharing her love of physical fitness and experience in the entertainment industry via her writing.