I bought an Emerson Portable Ice Maker at Target a few months ago. It has work perfectly until the last couple of times I used it. The first 3 batches of ice are normal, and then it starts making really small cubes. I only use Distilled water in it, and I only use it in an cool air conditioned house. How can I fix this problem? I love this ice maker and use it frequently. It is one of the best appliances that I own. Please help!