cleaning inside headlights

Have any of you ever taken apart the lense of the headlights and cleaned up inside there? How can i take off the lense? I am planning on getting rid of that ugly brown crap and dirt thats inside the lense, maybe even re-spray chrome in there if they make chrome colored spray paint?

put your headlight in the oven to soften the silicone ... this is how all the 6th gen people clear their shit and is how my friend cleared his s10 lights.

http://www.geocities.com/lx98civic/Clearing_Headlights.html