I think everyone sees this happen. You buy a pack of ice from the store, it's all nice and loose and easy to use and stays that way in the storage bin. You bring it home and if you don't use it, you put it in the freezer. For a couple of days the ice stays nice and detached and usable. However, as time goes on, the ice starts getting stuck together up to the point it all gets attached into one giant piece. What causes this? I've been trying to figure it out but I'm clueless. The freezers are well below 0... maybe moisture in the air starts filling the gap between the ice cubes to bond them together?