THE 2-MINUTE RULE FOR BIBO CRYSTAL

Hygroscopic crystal elements deteriorate when they're not constantly stored in adequately dry air (or perhaps a dry purge gasoline). This applies e.g. to KDP and BBO, and in a lesser extent to LBO. It might be practical to maintain such a crystal at a to some degree elevated temperature, which makes it much easier to maintain it dry.Inertness to Da