Doesn't really work – the real trick is to make sure your ice is crystallizing directionally. The impurities are the last to crystallize, so this pushes them ou

Doesn't really work – the real trick is to make sure your ice is crystallizing directionally. The impurities are the last to crystallize, so this pushes them out. Then you take your ice out of the container when it's 90% done, and your ice chunk is clear.