I have a 2005 car and the rear door seals often stick.
It seems to happen if I don't use the doors for a while. But it also seems to happen if I leave the car parked in the sun, even for a few hours.
A friend actually broke the rear door handle trying to open the door. I've fixed up the handle but I don't want it to happen again.
Is there any simple fix to stop the rubber seal from sticking? I was thinking WD-40 but I'm not sure if that would work and I don't want to use a chemical that might corrode or degrade the rubber seal. I tried cleaning the door frame and the seal with a damp rag but it didn't seem to have any affect.
Spray with silicone spray, wd40 will dry the rubber out. Maybe do it a couple of times over a week as the rubber will absorb some of the silicone.