I had two bad wrinkles in the shallow end for two years. One of them was a section that stood up about an inch above the bottom of the pool. Two weeks ago we go heavy rains and the pool filled above the bead. The water behind the liner lifted it enough I was able to smooth everything out. I have a dry well under the deep end of the pool that can valve into the main pump. I set it to pump to waste and pump the sump out. Ever since then the liner is perfect again.