The best way to keep your instrument protected from swings in temperature and humidity is:
#1 Keep your instrument in the case.
#2 Don’t expose it to extremes in temperature.
#3 Keep a humidifier in the case.

This little device is easy to use because it hangs between the strings, is easy to maintain and won’t drip on your uke. * Please note, you need to use DISTILLED water on the sponge to prevent mold from forming * Check out the video below for more info.