A SECRET WEAPON FOR BIBO CRYSTAL

Hygroscopic crystal elements deteriorate when they are not always saved in sufficiently dry air (or perhaps a dry purge gasoline). This applies e.g. to KDP and BBO, and in a lesser extent to LBO. It may be useful to keep this kind of crystal at a to some degree elevated temperature, which makes it simpler to continue to keep it dry.Inertness to Hum