Whenever I play I mute the string above the string I am plucking with my second finger, I usualy play index and midle. Now whenever I have a seriers of notes on the same string I alternate muteing and plucking fingers, however when I pull the finger past the string and rest it on the string above it it causes a muffled kind of tap. Its pretty quite and nobody probably could notice it, but lately I have been hearing it very slighty and it annoys me. Anybody else do this, or have done it in the past and fixed it? Any suggestions on a new better way to go about doing things?