Our in ground pool liner gets detached every winter in a few spots, and we struggled to figure out how to fix this issue. That is... till we saw some professionals do it. There are a few tricks that make getting the liner back "on track" much easier. Check out the video that provides the best overall instructions.

Step 1: What You Need

You will need

a kettle (or other hot water pouring implement).
a flat head screwdriver or stiff spatula
some wooden shims (in my case shish kebob sticks)

Step 2: Instructions

Boil your water and unplug your kettle. Carefully pour the hot water on the outside of the liner: this makes the liner much more flexible and makes it possible to stretch it back into its original position.

Pull the liner so that the edge hooks on the edge of the track. If you are unable to pull it up, maybe you need more water or someone stronger.

With the screwdriver, push the top edge of the liner back past the top edging.

Push the wooden shims into the crack to ensure that the liner does not pop back out from the track. Some people shave off the shims and leave the tips there to ensure that the liner does not pop back out. This seems like a more long term solution.

Your pool liner may not be designed in the same manner, I hope you can figure it out based on the few tips I have provided here and in the video. Happy swimming!