We have a round AGP, sunk halfway, and are cleaning up for our 2nd swimming season. We did not winterize this year, so we thought we would drain some of the gunk and refill. Our liner has slipped out of the track on one section of wall. I have read other similar topics on this site describing using hot water to stretch it back into place. My question is this: Is there some type of adhesive that is used to keep the lip (or is this called the "bead"?) of the liner in the track? Any suggestions are appreciated!