I used to use Windex, but now I use a mix of 70% 409 cut with 30% alcohol - it seems to work just a little better. This does a fairly good job in getting the "slime" off. When I want to restore the original luster (on glossy finishes), I use Monokote cleaner/polish with a cotton cloth (old tee shirts) as a final step. Monokote polish is not cheap, but you only need a small amount per cleanup.

Steve