Wondering what those white bits in the ice from your freezer are? Don't worry: finding white bits in your ice is nothing to worry about.
Ice cubes freeze from the outside inwards, so the middle of the cube is the last place that freezes. As the water freezes, all the minerals dissolved in the water are pushed to the middle, where they become concentrated and make the small white particles you see.
The word for this substance is 'precipitate' – and it's made up of minerals, like magnesium and calcium carbonate, found in hard water areas. These minerals don't dissolve when the ice melts, but they're completely harmless.
Hopefully that's everything you need, but if you're looking for more help, you can contact a Team Knowhow expert here.