Check to make sure your spray arms have clean holes and are spinning properly in cycle you can check by turning it on and opening the door during cycle make sure they are rotating good there will either be 2 or 3 per unit depending on model............clean out the sump area all the way to the bottom of the unit you'll need t20 and possibly t15 bits to dismantle and shop vac out the base of the unit to make sure you have no food clogging which will affect the spray arms cleaning things. Also clean any filters on the sump area with hot water in the sink removing mold or food or anything dirty. One way to check to see if your sump pump is working right take 2 coffee cups and face them open side up on the top rack.....run the unit after it fills up for 3-5 minutes, open the door and if the cups are filled 1/4 of the cup or more you have good circulation from the sump pump generally. Cut back on your detergent or change brands and don't use powder use gel...also avoid cheap brands like kirkland from costco and some dollar store type soaps. Good luck