How are people keeping their filament dry?

From what I’ve read, the desiccant that BBL uses will drop the humidity lower than typical silica gel desiccants, and molecular sieves can drop the humidity to a much lower point than any other desiccants. But does it matter? Is simply keeping humidity at lower than 20%, or maybe 10% good enough? Or should we be aiming for much lower RH values to maintain the filament after drying it, or to perhaps to help with drying it as well.