We just drained our AG at the end of last week because the liner had pulled loose around the top in a foot-long section...DISASTER!!! It shrunk enough that it pulled the beaded liner out of the beading receptacle around half of the pool. Needless to say, we ended up bringing in a truck load of sand to add to the bottom thinking that maybe the ground had settled. Didn't help. We finally had to buy a new liner. Our other one was only three years old. Now, from all the pressure (I suppose) of the weighted, shrunk liner, our beading receptacle looks a bit stretched. We have popsicle sticks all the way around the top of our new liner to keep it from popping all the way.
To make a long story short, we will NEVER drain our pool again. My hubby was ready to bulldoze the entire thing to the corner of the yard.