Left Hand Tone Tip #3, Obstructions

When something gets in the way of a string, it will rebel by giving off a muted tone, rather than a nice clear tone. It may be the edge of your finger touching the string next to where it is supposed to be. It may be the edge of your palm muting the high E string.

Hunt down the obstruction, and figure out what micro-adjustments you need to make to fix it. Then be sure and make a note of your discovery, and let your hand memorize the new positioning.