Experts advise leaving the glass in the freezer for 15 minutes and you will be able to see the result immediately. When should you change the glass of coarse salt?

The ideal is to repeat this operation once a week to avoid having too much ice. You can also use this trick if you already have a lot of ice in the freezer.

Why choose coarse salt? Coarse salt is a very effective ingredient for capturing humidity from the environment. To avoid having too much ice in the freezer, the salt will absorb it and keep it cold.