Do you use 3D printers in your school? Do you notice a lot of failed prints sometimes? These failed prints are often due to humidity ruining the filament and causing it not to stick well. I was running into this a lot with filament that had been sitting for a while. Despite packing them in dessicant packets and ziploc bags, I was still struggling. After some research online, I found the Sunlu Filament Dryer! It really works!
Think of the filament dryer as a little mini oven with a blower. It heats and dries your filament either as you use it or you can dry it out and put it away. The dryer is actually set up so you can use it as a spool holder and feed your filament directly to your 3D printer if you wish. I have used mine to "bake" several spools of filament (normally for 6 hours) before transferring it to the normal spool holder on the 3D printer for printing.
There are many choices, but I settled on the Sunlu as it's the best price to function ratio.
Get yours here! https://amz.run/7CBM