This (or something like it) is what you need. Obviously you can make your own but I like the precision control this has: https://www.amazon.com/dp/B09XMW3DND?psc=1&ref=ppx_yo2ov_dt_b_product_details

So use the heated dryer to "dry" the filament and use the dry box to keep it dry while not in use. Note that when you open filament up from the package, it's not dry, even though it was vacuum sealed and has desiccant with it. I learned that from trial and error with the PETG-CF. It wasn't until I used the heated dryer that the material printed well.

My current procedure when I get a new spool is 6 hours in the SunLu, then immediately into this dry box: https://www.printables.com/model/72870-ikea-samla-filament-spool-roller - I have a few for just general storage and then three functional boxes that I use for daily printing. Or they go directly into the AMS if I'm using that.

I do this for everything but PLA. For PLA I seem to be able to just open and use without issue.