So i just bought a Jo-Ral copper bubble mute from Woodwind & Brasswind. I received it today to find that the cork was not applied very well and is falling off at the crease. Also the mute looks a bit dirty and used but there aren't any dents. After spending like 70 bucks on this mute and having to go through this inconvenience I don't think I'll be buying from WWBW anytime soon. In the past I've tried to reapply my cork to my Harmon wah-wah after it falling off while I was playing a show in the pit, but I did not do a good job at all and never got it to stay. I used hot glue when doing this and the glue just didn't stick to the mute. What can I do to secure the cork tightly on this new mute without having it effect the mute or my trumpet? For example I don't want hot glue on my trumpet and also I don't want the true sound of the bubble to altered by the fix. I do not see this as a major problem, so I don't think sending it back for a new mute is necessary. Please help, and keep in mind it is a Jo-Ral copper bubble trumpet mute! Thanks.