Another possible problem may be that your third finger is slipping off the hole it is covering as you reach for either the B key (the right hand) or the C# (the left hand). This happens often with some of my younger students with small hands or even older students who have poor hand position. This is especially true with the left hand since the hole for the third finger has no ring and is therefore not as easy to feel when you slip off. Both the left C# key and the right B key will seem like a stretch for the inexperienced player.
A leak in the third finger (especially the left hand) will easily result in a squeak.
The exercises given in the previous comment are good either way, just play close attention to notice if you are moving your third fingers as you reach for these keys.
Sep 08, 2011 Rating
Just what I needed by: Anonymous
I was so glad when I read this post! I was practicing my clarinet and had a hard time getting the right tone and air that I needed, so I looked on the internet and came across your site! I then realized that I was concentrating on my fingerings and notes so much that I wasn't so focused on my embouchure. Embouchure is so imporntant so I'll make sure that I'll play a scale and concentrate fully on my embouchure. Thanks so much!