This dishwasher is no longer cleaning the dishes proprerly. The top rack seems to have crumbs on the dishes. It also leaves a rough feel to the dishes. the bottom rack does fine most of the time but the dishes at times are not entirely clean . Does it possibly have a filter that may need cleaned? It worked well for quite some time and then all at once this started. seems to me like it is in the rinse cycle or maybe not enough water?