Mask Freezone blanc

Very cool,bit pricey however 1 BIG problem {can be fixed easily). Was very hard to clean the coating: I followed the manual on how to clean but it did not work. It took me 2-3 days before I could use tthe mask &no fogging. I would NOT recommend using toothpaste as this is abrasive & would rough up the polycarbonate lens. At first I used washing up liquid (overnight} X2 , DID NOT WORK. Then a lighter.(don't used this unless you are skilled) the methanol , then surgial spirit. I have been scuba diving for 35 years tech & past instructor.