Indonesia is a tropical region where humidity is quite high. Therefore, you must pay attention to the storage of cameras and lenses so as not to get mold due to humid conditions. In addition, humid and continuous air can damage electronic components and camera sensors and the onset of mold on the optics. To clean the mold on the inside, it costs a lot of money, KEE friends can reach 250-750 thousand.
Source : https://www.diykamera.com/cara-mem Bersihkan-lensa-kamera-dari-jamur
However, very dry air is also not good for camera storage because it can disrupt the camera's mechanical function.
So what is the ideal humidity number? The ideal figure is around 40-50% RH (Relative humidity, ideal humidity). The easiest way is to check the manual for your camera.
Recommended storage method:
1. Buy a dry cabinet / dry box
Dry cabinet is a special cupboard for storing electronic goods. You can set the humidity levels in the storage room according to your wishes. The price is around 1 million rupiah.
2. Use an airtight box and silica gel
For a cheap version, you can use an airtight box and put silica gel in it. You can also buy silica gel which has a color indicator to find out the water content, and you can plug it into electricity to dry it again.
Source : http://belfot.com/tips-menyimpan-kamera-lensa-kelembapan/
3. It is recommended not to purchase a storage box equipped with a heating element as the heating element may overheat and may damage the camera sensor.