Alright, I used the Zymol screen clean kit to completely remove all of the yellow on my headlights. It worked perfectly and they are really smooth and yellow free. The problem is the INSIDE is still yellow. If I take the headlights out of the grill, will I be able to get to the inside of the lens to get the yellow off or is the lense sealed so that I can't? Anyone who has taken the headlamps out should know if it is sealed or not. I just don't want to do it and have them sealed so that I couldn't clean them.