Luke & Slim thanks for for responses. I’m using a Hohner Special 20 approximately 8 months old. I did run water through it last week so I don’t believe anything is clogging the reeds. I’m thinking it’s a technique issue since -9 and -10 does not get any easier. So my question is, what is the proper technique for these. I don’t seem to have a problem with -1 through -7. Thanks for the help.