Dry-rotting vinyl liner

[RknRusty]

I think it's about 5 years, I intend to look up the paperwork tonight.
I bought some vinyl repair kits today. I need to figure out how to get the duct tape residue off without making things worse. I think any cleaner other than soap will destroy what's left of the liner.
I'll check out Boxer Glue.
Thanks

[Poconos]

Gasoline will cut the duct tape goop without hurting what is left of that yucky liner. After that wipe down with isopropyl alcohol to remove any hydrocarbon residue left from the gas.
Al