Wrinkled liner

Over the last 2 years our pool liner has continued to develop wrinkles .... lots of them !! I tried Botox... as it worked for my in laws.... but they are worse than ever before. The pool is approximately 20 x 40...... 36,000 gals .... so draining it is not my first option as water must be brought in to refill it. Any suggestions for removing the wrinkles from the liner is greatly appreciated !!!

This is not my area of expertise AT ALL! But, I know there has been some discussion in the past where people have had some success using a toilet plunger to try and alleviate some of the wrinkling. Use the search feature in my signature and see if you can locate some of the threads where this has been discussed in the past. Sorry I can't be more help with this one.