I notice little white looking flakes in the bottom of my glass of water once all my ice melted. I figured it was my in freezer ice maker, so I pulled out my old school ice cube trays and the same thing happened when the ice started to melt, I could see little flakes coming off of the ice cubes. But when I tried this with store bought ice it was completely clear. What is the cause of my dirty ice? My faucet water is clear but when frozen and melted, its dirty.