Hi, I've been playing the trumpet for about 10 years and after moving to a new teacher he has pointed out that I never keep my third finger on the valve which is slowing me down in runs etc. I'm not sure how long I have had this habit for, but I am struggling to get out of it! I've tried putting blue tac on the valve to keep my finger in place, but I always find a way to move it. I'm not sure whether it is just a bad habit or its something to do with the structure of my hand (I have very small hands and my third finger always seems to be at an angle when on the valves) as I have noticed that my brother also has the same habit. Can anyone give me any advice to break this habit?