PLA filament absorbs moisture from the air and becomes brittle, or so I'm told. I know the black filament has been left out for several years and breaks under its own weight.
We now have a cooler with Desiccant! The desiccant is the orange stuff in the tub on the left. The instructions to recharge it are on the blue bag behind the tub. It is supposed to turn green when it is saturated. You can recharge it in the makerspace microwave or take it home and put it in the oven.
Please keep the filament in the cooler with the lid closed. Might as well keep the ABS in there as well.