Disaster! The first time I tried using this cleaning cloth it became immovably wedged in the alphorn lead pipe. I tried to poke it back out with long objects (such as trombone cleaning rod), but the more it was poked from either direction, the more firmly it remained stuck. I eventually spent 2 1/2 hours poking it repeatedly with a skewer until I had shredded the cloth and could pull it out in fragments.