Look around the plumbing aisle or plumbing supply shops. They have vinyl & plastic caps that go over the end of a roll of copper tubing. Buy two or three, make sure your carrot tip is clean & dry, slide it on & you're good to go. A drop of liquid electrical tape helps if you're especially brutalMy Garrett Carrot tip wore through and now it's giving false readings, sometimes stays with a constant beep on even when near nothing. Is it common for these things to wear out? I've had it less than a year and the tip is pretty much gone. I don't dig with it, it's just sanded off. Can you coat them with something? I doubt if it's waterproof anymore because it was doing weird stuff from just getting the dew from grass on the tip.