iamthewhitey

I may have some insight. Are you sure you used traditional mineral spirits or did you by chance use a "green" mineral spirits substitute not realizing it? Ive bought at home depot a can of "Klean Strip Green" which on the label looks like it's just mineral spirits aside from the small logo change but it's actually an organic substitute. It probably doesn't evaporate when enclosed like in a golf grip or it reacted with the tape/grip making a paste instead of evaporating. I know from experience if you let it sit the liquid will sort of "gel" and get lumpy. That's the most likely answer I can think of.