Hi,

I recently build a filament storage with one of these desiccant dryers boxes [www.aliexpress.com]

I have it now in the filament box and the moisture percentage has stayed at 45% for 3 days and its lower than ambient moisture but still a bit high for my taste, but I have no baseline to compare.

Does anyone have a similar storage solution and can share some long term moisture observations?

Cheers

Depends on where you live. I live in Eastern Oregon and humidity is often in the teens. I don't even cover my filament.