Taken from my book
You have already learned how to hold the clarinet properly. We need a permanent control and introspection whether we have fully adopted it.
The basis of good playing and a favorable impression on viewers and listeners are correct, ie. natural and relaxed position in holding the instrument without squeezing and spasm.
In order to have your fingers relaxed, not stiff and thus impeded in its function, it is necessary to:
1) keep them bent in a gentle curve;