I've noticed that when I bend on the 8th hole, weird things happen. If I blow normally, the sound is OK, but upon an attempt to bend (downwards, during the draw), the sounds stop to be melodic and all I can hear is a dull hissing sound, together with a hint of a very high-pitched whizz - as if the reed itself had actually stopped vibrating.
I have firstly observed it on a $10 North Star harmonica in D, so I just blamed this for the not-exactly-perfect quality of the instrument. But after some time I bought a Hohner Special 20 in C and I hear exactly the same thing! And again- it's only the 8th hole.
Is this a known problem? Am I doing the bend wrong? Or maybe is it possible that I have damaged the harmonica somehow during the cleaning or by blowing/drawing too hard?