Has anybody used one of these mini "dehumidifiers" to dry out filament as a substitute for buying a bunch of the desiccant beads? My filament seems OK, but I could do better to keep it dry.
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The one in OP's picture is one such device. You plug it directly into the wall and it heats up. No fan though, just passive convection
Oh, so the OP's question is about using recyclable beads instead of single-use ones?
I though it was a machine that forced air into the beads.
I didn't realize that the desiccant beads were able to be dried out. I thought they were single use. I have a bunch in the bottom of a Rubbermaid tote with a rubber foam sealed lid along with my filament. I don't know how to tell when the beads are "full" and started thinking about a more recyclable approach. After thinking about it a bit, I should probably get a humidity meter.
The ones that are sold for single-use tend to break into pieces when they absorb too much water.
The ones intended to be reused normally have some mechanism to tell you they are "full", like changing colors.