A little goes a long way when it comes to dish soap. Peter Carruthers / Getty Images Suds can be a satisfying part of the dish-cleaning process. When you see bubbles, it's a good sign that your soap is interacting with grease and grime. But chances are you're using too much soap and losing out on money."Many people overestimate how much soap is needed," says Muffetta Krueger, a cleaning expert...