i bought red style euros and there is a white cloudy film as developed in the inside of the light i have already cleaned the out side 100% sure its on the inside also put it in the oven and tried taking the tail light apart also put soap water in the tail light swished around everything thanks for the help

 

My guess is that there is some sort of condensation forming and then possibly drying, leaving behind mineral deposits. Leaks are common in these aftermarket "euro" taillights, which is one reason why most people suggest to avoid them. If you're unable to get them apart (which is likely), then the only real solution would be to replace them with a new set, or the OEM lights. If you get a new set, try sealing all the seams with silicone sealant before installing them.

 

well i found what works but thanks anyway normally i dont replace things i fix them