Kenmore dishwasher has never cleaned dishes

Question

My wife and I just rented a new house 3 months ago. The dishwasher has never cleaned dishes thoroughly. It leaves soap and debris dried on the dishes at the end of the cycle. We are tired of waiting for the landlord to help and are looking for some advice. Our landlord didn't install our washer or dryer correctly either so my guess is that his "team" screwed u the install on the dishwasher too.