A couple years ago I paid a contractor to put in a bathroom in my
basement. He did a poor job, many more problems than I'm going to get
into here.

One issue is that, as far as I can tell he did not use nearly enough
adhesive on the plastic shower walls. They buckle significantly as the
shower warms up - to the point that one wall has developed a crack in
it because of the buckling.

Do you think I have the problem diagnosed correctly, not enough
adhesive was used? The wall is greenboard and I don't think water is
getting back there.

If I understand the problem, then what I was thinking of doing was to
pull the walls down, clean things up, and re-install.

1. How do I easily remove the plastic wall without damaging the wall
or greenboard? Some solvents? I'm worried about just pulling. Not
sure what adhesive he used.
2. What type of adhesive do you recommend?
3. How much and where exactly do I apply new adhesive to prevent
buckling? I am hoping that a little extra adhesive on the back side of
the short crack will prevent it from expanding or allowing water
through. Doesn't have to look perfect, it's a 2nd bathroom in a home
we will be selling in a year.

Thanks.
Brian