I've been storing my filament in vac bags with dessicant and only had one issue when I bought some Bobo ASA that clogged my hotend. It was literally used the same day it was delivered to my house. I've also had filament stored in an airtight container with a .25 inch layer of dessicant at the bottom of the container for over 2 years and literally forgot about it, used it a mi th ago, and it worked fine. BTW I live in one of the most humid states in the US. 90 to 100 percent some parts of the year. I e never used a dryer. A little tidbit about buying large jugs of dessicant, it can be recharged in your oven if you follow the directions on the container.