It’s about that time of year (in the US, anyway) where the air starts to get cold and dry. This time of year is really not good for classical guitars. Unless your instrument is kept at a reasonable level of humidity — around 50% in most cases — bad things can happen. It can be as serious as a crack in the top or it could be something small like a slight change in tone.
- A Hygrometer. This is a device that measures humidity in the air. It’s very hard to know if you guitar needs a humidifier if you don’t know the actual humidity.
- A Guitar Humidifier. This goes in the guitar’s soundhole, like this:
If you want more humidity in the guitar case, Oasis makes a case humidifier. Most humidifiers require distilled water, so be prepared to buy a Gallon at your local grocery store.
- A room humidifier (optional). Sometimes guitar and case humidifiers aren’t enough to raise the humidity level to a safe range. If not, consider picking up a room humidifier.