Have had a few service appointments but to no avail. The dishwasher just doesn't clean at all. We have tried different dishwasher pods, running hot water before we start the dishwasher and a few other tips. But the dishwasher really has to have totally clean dishes regardless of the cycle it runs on. The bottom rack dishes are dirty, knives in the tray are never clean because the waterwall is just ineffective. Sorry for the rant, I have had a refunded Samsung Dishwasher and a refunded Samsung Refrigerator. It's super frustrating dealing with this washing machine but wanted to see if anyone else is having problems with theirs. Its still under a 5 year warranty with Home Depot but considering replacing it with another vendor and model. Please let me know if you have any suggestions to improve its cleaning.