I get it that pins are sweaty and gross in tournaments. Wiping down machines with a towel makes a ton of sense. The problem with wiping down machines with your shirt is now all of that filth is on your stretched out shirt and you carry it with you for the rest of the day. At least you can wash your hands. Maybe tournaments should include one towel per player with the entry fee. Generic ones that are used for waxing and cleaning pins can be had for $0.89 a piece. I'd gladly pay that with my entry fee. Tournaments could even have them made with their logo on them as a keepsake. This needs to happen.