Summary of "I REPLACED DESICCANT in my AMS for the LAST TIME!"

Keeping Filament Dry Inside the Bambu Lab AMS

The video presents a cost-effective and sustainable method to keep filament dry inside the Bambu Lab AMS (Automatic Material System), which functions as a filament dry box using desiccant packs.

Key Tips and Advice

Difference Between Dry Box and Dryer

Dry box: Uses desiccant to absorb moisture and keep filament dry.
Dryer: Uses heat and airflow to remove moisture from filament.

Issue with Bambu Lab Desiccant Packs

The original desiccant packs are single-use and not rechargeable.
Once saturated, they must be replaced, which can be inconvenient and costly due to shipping.
Saturated desiccant changes from white powder to a squishy yellow gel.
Humidity levels inside the AMS can be monitored via Bambu Studio (scale 1-5) or visually by checking the desiccant.

Reusable Desiccant Solution

Use 3D printed, refillable desiccant containers designed to fit inside the AMS.
The featured model is the “Spillproof AMS Desiccant Box” by AeonJoey, which holds silica gel beads and a round hygrometer.
Containers have a mesh grille for airflow and secure backs to prevent spills when removing.
Silica gel beads used are color-indicating (orange when dry, green when saturated) and can be recharged by microwaving on defrost or oven baking.
This approach allows reusing the desiccant beads multiple times, reducing waste and cost.

Printing and Installation Tips

The grille is printed using a slicer trick with high grid infill and zero top/bottom layers for airflow.
After printing, remove supports, install the hygrometer, fill with silica gel beads, and insert into the AMS.
Remove old Bambu Lab desiccant packs if saturated to avoid potential leakage.

Benefits

Maintains low humidity inside the AMS, protecting filament quality.
More economical and environmentally friendly than single-use packs.
Compatible with new filaments requiring drying, like Bambu Lab’s PETG HF filament.