We make drying cabinets for 3D printing, and during our own testing we found something worth sharing. In a room that sits around 60% RH, open spools pick up enough moisture to cause stringing and rough surfaces within a few days. Sealed storage with desiccant fixed it for us. We also noticed the printer itself runs more consistent when the spools feeding it stay dry. Curious how the rest of you handle storage in humid climates.