Hi I recently received a Acebeam k75. But it has some quality issues. The first, and main one is on the lens there is a oily film that I can't remove. I have tried eye glasses wipes with, and without rubbing alcohol. I am able to clean lens and it is crystal clear. But within a half hour or so there's a white film on the lens. I have tried many times to remove the film and it just moves around the lens. There are also small specks on the reflector which when the light is on glow. Has anyone else experienced this problem. Any advice would be greatly appreciated thanks