Get one of those power buffers with the foam wheel pad thingy. It doesn't hold heat in the pad. It'll do the best job and won;t burn your windows. Just use some descent was with it.
and if you do this^... dont use paper towels, use a clothI use windex then pledge(yes, the stuff for wood) to clean/clear mine up ever once in a while. It's probably not as good as those other two options but it takes 5minutes and makes a difference(in my case)