The soap by itself doesn't, but it should be even shiner with the finish used along with the soap. It may even repel rain spots. I rarely use my dishwasher for anything but a dish dryer. I just keep it propped open about 3 inches with the top rack pulled out so I don't have to deal with a regular dish drainer. After putting the dished in it, I also dry the inside of the door. You guys may not have to worry too much about moisture build up, but in Florida, avoiding anything that may cause mildew is the norm.