We have been in our townhouse for 3 months. Two weeks ago, DH ran a dishwasher cleaner through our dishwasher. The object is for the dishwasher to get hot enough to melt the wax plug, which pulls all grit and sediment out of the dishwasher. After the cycle had finished, he opened the dishwasher to find a perfectly intact cleaner as it had not got hot enough to melt the wax. He did some investigating and found that there is only a cold water outlet where the dishwasher is located and it does not make its own hot water. So, for 12 years, this dishwasher has been run on cold water. No wonder it did such an awful job.
It has now been fixed, which involved cutting the water line, and making a mess. I am certainly glad the Thanksgiving dishes can be washed now and not rewashed by hand.