We recently noticed cracking in our IG vinyl pool liner on the side of the pool that is South facing (all sun, all day). There is cracking in two places: a) at the top part of the liner where it goes into the coping and b) about half an inch below where the actual patterned part of the liner is bonded with the upper part (described in "a" above). This cracking continues for several feet along South facing side.
Having said all that, I have two questions:
1) Is there some kind of lubricant that needs to be applied to "a".
2) What is the best method for / best available materials for patching this type of cracking?
Here's a photo: