A lot of wine and restaurants always have a problem, that is, the freezer at the bar sometimes has a layer of fog on the top of the freezer, in order to solve this problem can take a lot of time, next I will introduce a small trick for you.
Towel (fiber, cotton), dish soap
Wet the towel and twist it into a semi-dry state, and apply the dishwashing liquid on the towel, not too much, meaning that it is OK.
This page is an illegal climb taken from experience
This small effective cycle is a few days, can be used repeatedly