How to prevent the windows from sticking to the rubber seal?

If the interference is mild it may be useful to apply silicone spray to the rubber seal. As with any lubricant though, the effect will not last long.

The permanent fix is to address the cause for the interference. More likely than not the issue will be caused by a slight misalignment of the window regulator. Old rubber seals are unlikely to cause the window glass to stick as they tend to harden with time.

Happened to me with my 01 GC Laredo. I took black electrical tape and folded it over the flap along the whole window. Works great so far. Hasnt stuck since.!

The old trick I knew was rubbing The seal with a dry bar of soap. Doesn't last forever but no worries of ruined clothes from touching it

I have used Dupont Krytox (GPL-205). It is expensive, but even a thin application to the rubber lasts a long time.

When this happens, I would first use a pipe cleaner to get out whatever gunk or adhesive is sticking to the window at the top. If it still occurs,get thin paper and put it in between the window and the bottom rubber area. If this paper sticks or has anything on it, I would go to drastic measures, like replacing the window, its motor (which may be where the sticky stuff is from (ie. the grease) and the rubber/plastic water seal from the inside and outide.