I see this all the time in tourneys and our local league. I am not calling out one individual here, but rather a plea to the tourney community.
Player steps up to play, sweaty from playing/standing for a couple hours, peels the t shirt off of his sweaty stomach and wipes down the lockdown bar and flipper buttons with said shirt that may or may not have ever been washed, and plays his game. Ball drains and now its my turn to step up to the germ infested pinball machine. I don't carry a collection of sanitary wipes with me, and don't want to have to disinfect the game each time I play a ball. Seriously grosses me out, but I see this ALL THE TIME. Please bring a towel with you. Thanks.