I have a 5 year old Polytech 24' AG pool. When I uncovered it today, I noticed that there are 3 areas where the liner has apparently slipped out of the coping and sagged inside the pool wall. The top of the liner is only about 1/4" below the top of the wall, nowhere near the water level. The areas very small, the largest is only about 6-8 inches long and the other two are about 4 inches. I would not have noticed them if I didn't have a pattern in the liner. It may be in areas between the coping strips, I'm not sure without taking the rails off. We didn't install the pool, so I'm not sure what exactly the set up is.

My question is, should I try taking the rails off and fix them, or should i just leave them alone? My gut instinct is to leave them alone because I fear damaging the liner, but I'm afraid that the liner may slip out further.