I don't have a filament dryer but probably should... I run a humidifier in the house most of the time and if my filament has not been re-packed after use it's probably not so good for my future prints without storing it with the dry-packs for a few weeks. Archive: https://archive.today/8JlBj From the post: >>Many FDM filament dryers have a port through which you can guide the filament. This handy feature allows you to print from the spool without removing it from the dryer, saving time and limiting exposure to (moist) air. Unfortunately, these exit ports aren’t always thought out very well, mostly in terms of the angle with the spool as it unrolls. The resulting highly oblique orientation means a lot of friction of the filament on the side of the port. This issue is addressed in a recent [Teaching Tech] video, with a simple, low-cost solution.