Simple CFS Mods/Upgrades for Massive Humidity Reduction

Community Contributions
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I made a simple but huge upgrade to my Creality CFS setup and wanted to share the results.

I’ve been fighting humidity levels sitting around 25–30%, which isn’t terrible—but definitely not ideal for filament storage. So I decided to print some attachments/mods for the CFS that add additional desiccant capacity.

What I Changed:

  • Replaced the stock desiccant chamber lids with removable, easy-access desiccant boxes
  • Added multiple extra desiccant holders throughout the unit
  • Printed desiccant holders that fit inside the filament spools (bonus: they add weight to light spools, which actually improves feeding when filament gets low)

Prints I Used:

1C
1C500×500 416 KB
2C
2C500×500 450 KB

I used indicating silica gel from Amazon so I can visually see when it needs recharging:

Print & Install Notes:

I printed in PETG for durability reason, but PLA (or PLA+) should work fine as well. I also used double-sided Velcro tape to mount the front and rear desiccant holders. The rear holder does require mounting, while the front one can sit in place on its own. Velcro makes it easy to remove/reinstall and keeps everything secure when swapping spools

Results:

Before: ~25–30% humidity

After: 8% humidity

3C
3C500×500 402 KB

That’s a massive improvement, and it’s been holding steady.

If you’re running a CFS and dealing with moisture, this is 100% worth doing. It’s a pretty quick print setup but makes a big difference in print quality and filament longevity.

Happy printing! 👌

I printed these with Overture 3D Filament PETG (Space Grey). Overture PLA+ and PETG are my go-to for easy printing, strength, and value. Affiliate links below:

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Were you aware that all of your links were through facebook?

1 Like
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No - I did not - thanks for letting me know :wink: