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Many players believe that tapping out moisture and wiping off fingerprints is the end of harmonica maintenance. However, as a precision instrument combining delicate metal reeds and sensitive comb materials, the harmonica requires much more than just a surface clean. If your harmonica is going out of tune or losing its response, it might not be "dirty"—it might be poorly protected. Here is how to truly safeguard your instrument.1. Temperature Control: The "Warm-Up" Ritual Harmonica reeds are typically made of brass, bronze, or stainless steel. In cold weather, blowing warm air into a freezing instrument creates a thermal shock that can lead to reed fatigue or cracking. Pro Tip: Always warm your harmonica to near body temperature by holding it in your hands or putting it in your pocket before playing.2. Humidity Management: Protect the Comb For those playing wooden-comb harmonicas, humidity is a major concern. Excessive moisture causes wood to swell, warp, or even crack, leading to