Hey everyone! hope someone can help! Self-installing a 27x52 round. Having issues with the liner. It's a Beaded liner that the top rail goes over. It seems after it's all seated that we cannot get the liner to sit properly on the cove. (styrofoam). We checked to make sure the roundness was good....which it was. The liner has sit outside for about 4 days in warm and cool temps. I heard they can shrink if left outdoors.....but really.....that much?? I'm stumped!

thanks!