Why does the 6-hole blues harmonica unconsciously lose its sound when it is blown to the 10 hole? I wanted to play 6, but I didn't know how to play 6. How to avoid it?

Usually it's not the piano, it's the breath.

Playing 10 hole is very important, so it takes a long time to practice single tone when you first get started.

When playing a single tone, breathe in the abdomen, relax your tongue in your mouth, don't interfere with the airflow, and relax your throat, so that the airflow can flow smoothly through your mouth from your open throat. Some people say I feel an egg in my mouth. I don't think it's that exaggerated, but it's important to leave some space in your mouth.

When you say healthy, it's because you suck out a curved sound. Bending is to bend the airflow through the throat or tongue, increase the bending degree and amplitude of the suction reed, and reduce the vibration frequency and pitch. So on the other hand, if you don't want to blow out bending sound, you must ensure the straightness of the airflow.

I hope I can help you.