This Print Profile includes all the components you need to upgrade your AMS to use loose (silica gel) desiccant. And the additional Dry Pods allow the AMS to hold more desiccant, which will mean longer times between refreshes. And the Spool Pods provide even more space for desiccant, and add weight to spools so they don't bounce as much when they are empty.

This has been done before, in many different combinations, but this design best meets my needs of AMS Dry Pod, Spool Pod and Desiccant Containers, and I added a Funnel to help load them with silica.

Note that the Print times defined by the print profiles above are for all the Plates in the respective Print Profile. Plate 1 of the All Dry Pods, Desiccant Trays, and Funnel Print Profile, which includes all the parts that you need to outfit an AMS with a round hygrometer, takes about 14.5 hours to print. If you use the Fast Dry Pods, Desiccant Trays, and Funnel Print Profile, the same Plate takes about 9.75 hours to print, but you give up some surface quality. Printing Plate 2 (without a Funnel) takes about 13.75 or 8.5 hours, respectively. Both Print Profiles generate fully functional and strong parts.

The latest Print Profile has been expanded to make it more friendly to printing with Bambu Handy. Now there are multiple Plates, each configured for a different type of hygrometer or no hygrometer. See the V9 release notes at the bottom.

The “All Dry Pods, Desiccant Trays, and Funnel" Print Profile has been printed by over 30,000 users successfully. My Profile was configured specifically for printing with Bambu Basic PLA, and it took several iterations to come up with the profile settings that would work reliably. However, these Print Profiles have also been successfully printed in PETG, ABS, and ASA.

If you have issues with these print profiles please add a comment to say why. I can't improve them if I don't know how they are failing.
 

There are 4 Wide Dry Pod options included that can hold different types of hygrometers.

• For Bambu or compatible Round Hygrometer with vertical or 30 degree tabs,  with a hole all the way through it, which should generate more accurate measurements. A 42mm diameter x 14mm deep body and a 46mm diameter bezel is supported. (Plate 1 w Funnel and Plate 2, no Funnel.)
• For Bambu or compatible Round Hygrometer with a shallow hole for the hygrometer, which allows the Dry Pod hold more desiccant, but may be less accurate in measuring the overall humidity level of the AMS. A 42mm diameter x 14mm deep body and a 46mm diameter bezel is supported. (Floating).
• For the Bambu Rectangular Hygrometer.  A 45x26x15mm body and a 48x29mm bezel is supported. (Plate 4).
• For the Xiaomi Bluetooth Thermometer Hygrometer. A 43x43x12.5 mm body is supported (Plate 5).

If you don't want to use the default Round hygrometer Dry Pod, then drag one of the floating hygrometer Dry Pods onto Plate 1 and swap it with the default Dry Pod. There are multiple parts included that can hold hygrometers, only print one.

It takes about 350 to 375 grams of desiccant to fill all Dry Pods and Desiccant Containers.

The Dry Pod, Spool Pod, and Desiccant Container covers include a detent to hold them in place more securely, but they can be a tight fit. Before you add desiccant, fit the covers into place to prevent fumbling with them when they are full of desiccant. The first time you insert a cover it may take some force, but it quickly becomes easier to slide. 

Note: Using the STL Raw Model files and enabling supports may generate supports inside the Dry Pods, which can be hard or impossible to get out.  Supports are only needed for Dry Pods with hygrometer openings. None are needed for the Narrow or Wide Dry Pods. If you use my 3MF file, I applied Filament Painting  to all the parts to prevent any unnecessary or internal supports. However, some minimal supports are needed for the hygrometer Dry Pods.

The Desiccant Insert Top and Bottom parts snap together. I haven't used any glue with mine. And a full one survived a drop off a desk onto a carpeted floor and did not pop open. But you may still want to glue them because the parts are thin.

Spool Pods (Plate 3) have two useful features: 1) Each Spool Pod adds another 82 grams of desiccant to the AMS, and 2) they provide additional weight to spools so they don't bounce around as much when almost empty.

Each Spool Pod consists of a Top, Bottom and Cover. The Top and Bottom snap together. Align the Top and Bottom on a table top then press hard on the Top until you hear a snap. You may have to put some shoulder into it, because it takes a fair amount of force to snap them together, but no glue should be needed because these really lock tightly together. After making sure that the cover slot surface that interfaced with the supports in the top is clear, press the Cover into the Top. The first time it may take a lot of force, but it slides easily after a couple of uses.

The Spool Pods are designed to simply snap into Bambu Filament Spools. They can be removed from a spool without removing the desiccant. Spool Pods are not effective when storing filament spools in vacuum bags, because the bag seals the vent holes on either end, and the inside of spool hubs are not vented.

Claymore Pods are designed for storing filament spools in vacuum bags. The inside of a Claymore Pod is vented, which allows exposing the desiccant to the filament, even after vacuum is applied. All sides of Claymore Pods are vented to enable faster refreshing. Claymore Pods are compatible with the Funnel and use the same covers as the Large Dry Pods (Dry Pod Large Cover.stl). The term ‘Claymore’ comes from the pod's resemblance to the shape of the personnel mine designed in the 50's. Note that no supports are used inside the Claymore Pods. This results in a rather ragged top inner surface, however it does not affect strength or functionality.
 

The Bambu Hygrometers can be found in the Maker's Supply store or the Amazon versions work as well. See ordering information below.

Note that both the Bambu Round and Rectangular Hygrometers are included in the Bill of Materials below. Delete the one that you are not using if you press the ‘Buy Now' button.

Or a Round Hygrometer can be purchased from Amazon at:

https://www.amazon.com/dp/B0885TFLZX?th=1
 

The Xiaomi Bluetooth Thermometer Hygrometer can be found here:

https://www.ebay.com/itm/114642177360

In the Android Play Store search for “Mijia Reader” for the phone app that can connect with multiple Xiaomi hygrometers.

The Desiccant Container/Trays can be loaded with generic desiccant and dropped into the slots in the back of the AMS. The top of the Desiccant Containers snaps in very tightly, but I would recommend gluing them as well. Also, the funnel slot cover is a tight fit. The first time it may take some force, but it quickly becomes easier to slide. And there is a detent to hold it in the closed position so it won't work its way out over time. The Desiccant Containers have vent slots on top and bottom to support faster drying, and the tops are now printed as a single part.

I used this desiccant:
https://www.amazon.com/dp/B01BLYLUSY

This desiccant does not include beads that change color when it absorbs moisture. Since I already have a Dry Pod hygrometer, the color beads are hard to see through the slots in the Dry Pods, and the AMS also has a hygrometer built into it, I felt that there weren't any significant benefits to using desiccant with color change beads. Also, the color change beads in desiccant contain methyl violet and other unfriendly chemicals, so they should not be dried in an oven or microwave that you also plan to cook food in. Non-indicating silica gel beads are safe.

To refresh the desiccant; pour it into a glass tray, place in the microwave for 4 minutes in defrost mode. Let it cool, then pour it back into the Dry Boxes. DO NOT put the Dry Boxes in the microwave! The desiccant gets VERY hot and will melt the Dry Boxes.

Here is a very interesting video by Stefan at CNC Kitchen who goes into great detail on the different types of desiccant, their strengths and weaknesses, and a variety of methods for drying them. He also spends a lot of time discussing filament bags, but the drying techniques that he describes for them also apply to loose desiccant.

Note that the Dry Pods will also work with the Hydra spool tray or my “AMS Tray with sliding dividers for wide spools”.

Or if you are using the factory Bambu AMS spool tray then the Desiccant Containers can be used to replace the desiccant bags in the slots on the bottom of the tray, and the original AMS desiccant covers can be snapped on top of them.

With fresh desiccant, the humidity went down to 10% (Level 1) after a couple of hours, and it was only at 20% (Level 2) after 6 months.

Here is a cool time lapse video by Rafael Bueno of the print:

24/4/7

V2 Added Pod for round hygrometers with vertical tabs.

24/06/13

V3 version adds an extension to the Funnel that allows it to cover Wide Dry Pods so desiccant is not lost when filling them. The same Funnel works also with Narrow Dry Pods.

24/10/7

V4 version modifies the dry pods that hold the hygrometers to support either vertical or 30 degree tabs. Adds detents to covers to lock them in place, and more desiccant volume to the through hole hygrometer drypod.

24/10/12

V4.1 adds a loop to the funnel so it can be hung on a hook, or with a string on the neck or a desiccant bottle.

24/11/1

V5 adds Wide Dry Pods for the Bambu Rectangular and Xiaomi Bluetooth hygrometers.

25/1/9

V6 adds modified support blocking on the Round Hygrometer Pod to prevent internal supports for Threshold Angles up to 45 degrees. The file sets the angle to 25 degrees, but sometimes the Support Threshold Angle is overridden by previous slicer settings when the file is loaded and some people were complaining about supports inside the pod. Now if it is overridden, you shouldn't see internal supports being generated. No changes were made to the geometries of any parts.

25/1/13

V7 updates the Desiccant Containers/Trays to use the funnel, a feature that has been suggested by many. The new Desiccant Trays are slightly larger, have vent slots on top and bottom to support faster drying, and the covers are now printed as a single part. The Top snaps in very tightly, but I would recommend gluing them as well just to be safe. Those beads go everywhere when they get a chance.

25/2/28

V8 Drops the height of the Desiccant Trays 0.5mm so they are not quite as tight a fit.
Added Spool Pods, where each pod holds an additional 82 grams of desiccant. They use the funnel for loading, snap together, and into spools.

25/3/4

V9 Creates separate Plates for each Hygrometer type, so prints are easier to manage with Bambu Handy.
Dropped the height of the Desiccant Container by another 0.5mm, so they are not as tight a fit with newer AMS units.

25/3/20

V10 Adds Small and Large Claymore Pods to the 3MF file.
Made a slight change to the top of the Spool Pods to minimize tabs breaking off.

Refer to the V9 Print Profile description for more detailed information on various Plates supported. The Plate options are:
Plate 1) Dry Pods: 2 Wide, 2 Narrow, 1 Round Hygrometer, Desiccant Trays, w Funnel.
Plate 2) Dry Pods: 2 Wide, 2 Narrow, 1 Round Hygrometer, Desiccant Trays, No Funnel.
Plate 3) 4 Spool Pods.
Plate 4) Dry Pods: 2 Wide, 2 Narrow, 1 Rectangular Hygrometer, Desiccant Trays, No Funnel.
Plate 5) Dry Pods: 2 Wide, 2 Narrow, 1 Xiaomi Hygrometer, Desiccant Trays, No Funnel.

Plate 6) Dry Pods: 3 Wide, 2 Narrow, Desiccant Trays, No Funnel (No Hygrometer).

Plate 7) Funnel only.