We have an in-ground pool with a vinyl liner. After opening the pool, we've noticed that a few sections of liner are sagging away from the wall. I've read elsewhere that a good method to reseat the liner are to heat it with either hot water or a blow dryer, followed by pulling up the liner and pushing it into place. the site also went on to try to recommend something called linerlock.

Has anyone dealt with this in the past? Have you had success in using the described (dangerous) methods?

Any advice or links would be helpful!