I've been liking the Brancher lig on sax, so I ordered one for clarinet. The darn thing will not stay on the mouthpiece. As soon as I start to tighten it, it just starts sliding up to the tip until it slips off. At first I thought maybe it was my John Pierce mouthpiece having a different shape, but I pulled out my mp box, and it happens on every clarinet piece I own. Then I'm thinking it's the lig that is defective. Well our friends in South Bend happened to double ship my order, so I opened up the second one and the same thing happens. I know I can probably put some tape or a patch on the back side of the mouthpiece to give it a grip, but I shouldn't have to do that. Has anyone else experienced this?