Yeah....I have the same problem this year. Lots of wrinkles from lots of rain on clay ground. I am going to wait until I get ready to close the pool and then I will drain the pool down and see if I can work the wrinkles out. I am afraid if I wait until next year that the wrinkles will be harder to get out from sitting all winter. I plan on trying to use a toilet plunger to work the wrinkles to the edge. Any better ideas?

Bruce