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Desiccant packet dehumidifier?

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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  • Haven't bothered with one of those since getting just the beads is probably way cheaper.
    I store my filament in an Ikea Samla box with added weather strips to decently seal it and just added 1kg of beads (orange to green color change) with a spacer grid to the bottom of the box. Constantly keeps the RH in the box around 20%, and I only have to dry the beads 1-2x per year (in the oven).

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