It seems to me the tricky part is always to get the rubber over the glass just right from the start. The tension has to feel the same all around, and it can be deceiving. Obviously it isn't like mounting a tire...The rubber can't adjust itself once you get it pulled in. My guess is you have the bottom and the sides stretched over the glass just a bit more tightly than needed and that left the top more loose. You may be able to reduce (or eliminate) these puckers by trying to move the rubber away from the puckered spot (on each side). This sounds a lot easier than it is and it may not work at all (more on that in a bit)...but the good news is you probably don't have to move the rubber as much as you might expect. If your pinchweld and mounting area are really nice and clean...maybe just recently painted...this will make moving the rubber a bit easier. If it was July and you could park it in the sun for an hour or two, that might help. If the mounting area is slippery with Dawn soap, that can help (I would not use WD40). If that area was rough or had any rust then the rubber probably can't be moved now. Sorry to say it, but the best way is to remove and start over, but I'd try to move the rubber with the glass in first. Question for you...when you pulled in the string did you start at the top or bottom?
