So i found out something today when I opened a fresh spool of Sunlu Filament today. I placed it in a drying box with a meter for humidaty and desiccant. The meter showed the humidatiy in the box jumped to over 40% for over a day. Showing that the vacuum seal was not good on the roll. I am looking for a electric Dryer that can do one spool that is not too expensive. I have seen some on amazon for $40 but not sure how well they work.