DIY Filament Dryer for 3D Printers Using Inexpensive Plastic Cereal Storage Boxes

I first started drying 3D printer filaments in the oven. Then I upgraded to a Print Dry unit that was basically a modified dehydrator. It was nice because you could dry and print from 2 spools simultaneously. This didn't solve keeping filament dry in storage.

These are the least expensive, clear, airtight containers that can be used to store and dispense filament.

WHERE TO BUY:

Cereal Containers Storage Set (4L / 135.2oz), 6PCS Airtight Food Storage Containers with Lids

MOISTURE METER (Hygrometer)

At first I started using digital hygrometers that display moisture and temp. The problem is that the batteries only last a year or so, and then your left with replacing a lot of batteries. Eventually you get battery replacement fatigue and stop replacing the batteries.

HEATER

TEMPERATURE CONTROLLER