The dishwasher was not cleaning the dishes.

Taking the upper and middle dish racks out, I reached in and pulled out the old parts, then popped the new ones on.
All of the ususal tips for our problem weren't cutting it, so we finally figured the seals at the back of the dishwasher were not effective in keeping the appropriate amount of water pressure in the spray arms. The rubbery seals had been degraded by harsh detergents. We ordered the new seals from your company after a phone call to verify we were choosing the correct parts and easily put them in place. Now our dishwasher does what it was designed to do! And less than $40.00 including shipping! We did not need a new dishwasher.