How often should I clean the dishwasher filters?

For light to average use, the filter system should be cleaned 3 to 6 times a year, while heavy use requires cleaning 8 to 12 times a year. You should also clean the filter after washing loads with large amounts of food soils or loads with heavy starch content, like potatoes and pasta. The filter may need cleaning if you notice food soils remaining on the filter or if a gritty film forms on dishware. (Page 38)