I am trying to get the clear lense off the black housing. Is this thing held on by a gasket or is it one piece because I can't get it off even with a screwdriver. I have polish that I can do the outside now all I have to worry about is the inside and its really gross. So what can I do?

 

I believe the lens is melted to the black housing from the factory. I used a dremel to to cut the clear lens from the black housing