frozen

I recently acquired a used fretless Fender and according to my tech during the set up, the truss rod is completely frozen. He can't tighten or loosen it. He says he got the set up ok for now, but if it does go weird on me in the future I might be looking at a new neck. Any suggestions to...

Can anyone recommend a brand of re-freezable ice gel, the type used for medical therapy? While the ice pack works well, I'm wondering if there's a better mousetrap out there. I recently tried and returned the chemical-style compress in which you fold the compress in half, combining the two...