Hi there, I have problem with my dishwasher. Detergent dispenser would open ,but detergent (in tablet) would not melt down , and the dishes are not properly washed. There are spots on glasses, and the glasses are foggy. The dishes seem to be too hot , so I am not sure what to do.... I do not know how old the dishwasher is. We moved in our place about a year ago, and it worked properly until recently .Thanks