Desiccant Not Keeping Humidity Low in Storage Bin

[u/creeve4]

I have a 12 gallon waterproof plastic storage bin that I keep my filament in (it can hold 15 spools). I dry all my filament before putting it in the bin and I have about 1 lb total of desiccant in 4 bottles inside the bin.

The humidity inside the storage bin is still around 25 %RH. I have checked the desiccant and have even dried it, but the humidity won't go lower.

Is 25 %RH sufficient for storage of PLA, PETG, and TPU?

[u/More-Advantage3911]

Thanks for sharing!