What would happen if you drop your harmonica in water?

If you drop your harmonica in water, it can cause damage to its internal components, especially if it's a brass or wood harmonica. Water can lead to rusting of metal parts and swelling or warping of wooden components. It's essential to remove it from the water quickly, dry it thoroughly, and allow it to air out before attempting to play it again. If it’s a diatonic harmonica, soaking it in water may also affect the tuning.