Normal playing in addition to fluctuations in humidity can trigger parts on your tuning devices to chill out over time. Loose bushing washers can rattle when you play, and loose buttons can eventually fall off and be lost, making tuning difficult. Examining your tuning devices is not only a vital part of routine upkeep, but it may just resolve that secret buzz or rattle you have actually been wondering about. The following procedure is best performed with the strings off, since it makes finding loose tuner issues more apparent.