We had a similar problem with our dishwasher, we replaced a few seals etc, but then we just decided it was best to get a new one, especially after it leaked and ruined our beautiful new wood floor, it might just be something little, or you may just have to decide to throw it on the scrap heap.

At least it is not a human dishwasher screeching at you, lol,believe me we only lasted one week without a dishwasher, we were out to that shop as soon as we could to get a new one, I have had one since my daughter was a few months old, and now I would be lost without one, empathy going your way Kelly.