16x32 IG vinyl pool. 7 years old.

There are 2 -3 spots along the coping wher ethe vinyl bead has pulled or popped out of the channel. These are no longer than 1" to 2" inches in length for any given place and are usually in the deep end. IS this common for vinyl liners as they age?

I am having a difficult time getting the bead to pop back into the channels. Is there a special tool or method that installers use to make this easier or should I start saving a few dollars every month n anticipation of a replacemnt liner one day?

Thanks,

Steve