I guess I didn't think about my latex gloves when it says on the back "do not use on rubber". I was cleaning some sap off of my hot-tub cover when my gloves started disintigrating.
Oops.
And of course the hot-tub cover is made of vinyl. Is vinyl also "rubber?" Hopefully I didn't cause too much damage.

Goo-gone also didn't do a good job of removing the hardened sap. Any chemical engineers out there know a solvent that will quickly disolve hardened sap, but not disolve vinyl?