Does anyone with a Del Sol ever have condensation inside their trunk lid? Has anyone ever insulated the inside of the trunk lid? Did that help with the moisture building up? Thanks for any advise.....

 

Adding insulation isn't the answer. In fact, it might absorb water and make the problem worse.

You have a leak and probably standing water somewhere. You're going to need to find the source of the leak and fix it.

I hear a common location for leaks on del Sols is along the pillars next to the rear window. There's clips in there that get moved around or worn or something and then end up letting water in. You have to remove the liner around the outside to get to the clips and repair the issue.

 

I had a 94 del sol and there were pools in my spare tire and moisture every where. I didn't know how to fix it.