High end squeal

If you find yourself playing on the high end of the harmonica and your draw notes have a tendency to squeal or note sound at all... play softer, drop your jaw and drop your tongue to floor of the mouth (a slight yawn will do this). Your tongue is resposible for all good and evil on the harmonica... if it sounds good, thank your tongue... if it doesn't, blame yourself for not getting the tongue out of the way! ;-)