LOOSE SCREW, IN YOUR GLASSES

The screw that holds your glasses tight against your head? It's gone the way of seemingly everything on expensive and hard to fix items. When you finally get a miniature screwdriver and restore your snug fit, grab some clear nail polish and dab it over the top of the screws. It's enough of a bond to keep the screws from coming loose again, but you could still get them out if you needed to.