When I am playing (let's just say 1/4 notes for the sake of the argument), and moving back and forth between open A and open E, I can't mute the strings properly. From E to A, muting the E is not a problem as I can use my thumb. But going from A to E, I can't get a good mute. I have tried using my left hand (unused) fingers by lightly resting on the (still resonating) A string, but the decay/mute is not 100%. Not clean. Should I be using my right (plucking hand) middle finger on the A when moving from A to E? I have tried it, but it is tricky as ****. Not sure I explained this properly, but suggestions and tips are appreciated. I really want to perfect the sound and style.