That partial tube of silicone caulk from last fall set up. Now, you have a big chunk of cured caulk that you may as well throw away.

Although you can't stop drafts and leaks with it any longer, that dried-up caulk still can serve you in the shop. Just strip away the tube and clean your abrasive belts or discs with all that solidified silicone. You'll find it works like a charm.
—Robert Thompson, Buckeye Lake, Ohio