Hi all, I can't find anywhere info on how to dismantle the vent window. I have two sets, one with good glass, and one with good chrome. Need to swap and replace any seals while I'm at it. They've been removed from the car, but I can't work out how to remove the glass. Also, what is the glass mounted in the frame with ? is it sealant or is there another rubber seal that I need to buy ? Thanks in advance.