I am a first time pool owner and my pool is filled and we are loving it. I do need some help with my liner if there is help. When we installed our liner we were very careful to get out all the wrinkles and did most of them. But as the pool was filling, I notice on one side of the wall that there was some slack in the liner and thought it would eventually stretch out, but what has happen it when the water got to it, it basically wrinkled up against the wall. Its really not noticable because it under water, but I know it there and would like to get them out. Any suggestions?