THE FACT ABOUT BIBO CRYSTAL THAT NO ONE IS SUGGESTING

Hygroscopic crystal materials deteriorate when they are not normally kept in adequately dry air (or possibly a dry purge gas). This is applicable e.g. to KDP and BBO, and in a lesser extent to LBO. It could be helpful to help keep this kind of crystal at a fairly elevated temperature, that makes it much easier to maintain it dry.Inertness to Dampne