Regardless of instrument family, a small set of storage basics protects both playability and resale value, since most long-term instrument damage comes from slow climate stress rather than a single accident.
Humidity
- Wooden instruments (guitars, violins, cellos, clarinets, woodwind bodies) are the most climate-sensitive, since wood expands and contracts with humidity changes - this is what causes cracking in dry conditions and swelling, sticking or warping in overly humid ones.
- A stable middle range is generally more protective than any single "perfect" number - large swings, not just extremes, are what cause the most damage over time.
- Case humidifiers (for guitars) or room humidifiers/dehumidifiers are the standard tools for keeping wooden instruments in a stable range, particularly through seasonal heating changes that dry indoor air significantly.
Temperature
- Cars are the most common source of serious, fast temperature damage - a closed vehicle in either hot sun or freezing cold can reach extremes well beyond what any instrument is built to tolerate, quickly enough to cause real damage (cracked finishes, warped components, or in extreme heat, glue joints failing).
- Rapid temperature changes (e.g., bringing a cold instrument straight into a warm room) can cause condensation inside the instrument or case, which is its own separate risk from the temperature extreme itself.
The practical takeaway
A quality case is the first and cheapest line of defense for nearly any instrument, since it buffers against both humidity and temperature swings far better than an instrument left exposed - worth factoring into a used-instrument purchase if one isn't already included.
