Since many of us have run high levels of sanitizer for many years in liners that are 9, 10, even 15 years old, it's a little hard to tell which wrinkles are due to excessive chlorine, and which are due to age, sun, temp changes, shifting, etc.

DurhamHouses, you need to understand that many users come here BECAUSE they have problems they cannot solve and the pool store has only made worse. We have helped thousands here over the last 10-15 years and somehow managed to get their pools cleaned up and running nicely all on our own. Our advice is always intended to be clear, easy to follow, and, most important, effective. We also WELCOME new users and have answered the same elementary questions hundreds of times. That's what we are about. If you cannot accept that, this isn't the forum for you.

You are welcome to debate alternative treatments and techniques in the China Shop but not while we are working to help an OP clean up their pool. It is merely disruptive and confusing.