J.H.
This won't help you now, but once your husband installs the dishwasher, I HIGHLY recommend a product by Prince Lionheart--it's for washing the valves, and you hook it onto the top rack of the dishwasher, and it spins while washing to make sure the valves get REALLY CLEAN! It is a must have. Good luck in the meantime. I agree with the vinegar idea. Bleach sounds kind of harsh.