Would it be okay to heat these up to remove them?

They really look aged and I believe they are diminishing my light output.

If I were to heat to remove, how should I clean the headlights of the adhesive without destroying the clarity of the glass/plastic?

They are on my foglights too.

 

man i was going to put some film on my headlights lol! well you can heat it up if you want see what happens, i guess just dont use a razor blade that welll def *** your headlights up!

 

Well I wouldn't really call it a film. I haven't seen the film type they talk about on here. I could be mistaken, it may be the same - a very thick film

This is more like vinyl, although it feels like soft rubber.