Just above the skimmer of my in ground vinyl liner pool I’ve been getting a build up behind the liner of this thick whitish opaque goop. It pushes the liner out of the track. You can push it out and scrape it off with a spatula. I can not figure out what is going on. It’s been going on awhile, but this last time was a lot of goop. I don’t see it happening anywhere else. It’s just the section above the skimmer. Some kind of chemical reaction? I don’t know what would be oozing goop. Any idea? My pool water is fine. Hubby threw the goo away before I could get a photo. I’m sure there will be more.