Dampit
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A Dampit is a trade name for a humidifier which can be placed inside a musical instrument to avoid possible damage caused by dryness. Musical instruments in dry environments can develop warped or cracked wood and unglued seams. Dampits come in several different sizes for different instruments, including the violin, viola, double bass, some types of drums, and guitar. They can be used on most instruments consisting of wooden sounding boxes, as long as there is a hole somewhere to insert the Dampit into. On a violin, cello, viola, or bass, the Dampit is moistened and inserted through the f-hole. On a mandolin or guitar, the Dampit is inserted through the soundhole, and secured with a clip. On timpani or a bass drum, the Dampit is inserted through the side hole.
Dampits can be left inside instruments while they are played, and most people agree that they do not affect the sound[citation needed]. Each Dampit is sold with a humidity indicator card, to tell the musician when the Dampit is needed. The original Dampit was invented by Ralph Hollander[citation needed].