Left: I opened a sealed roll of a filament purchased in 2018 and I printed that rose
Right: I dried that filament in the creality dryer overnight and sent the print again
This pic was taken on 10th April. After drying the filament I put it back in storage and I forgot about it until it exploded today
Maybe an enclosure with inlet and outlet fans, and either a window AC unit or a dehumidifier dedicated to your printing room? I definitely recommend watching this video before investing in a dehumidifier, a lot of helpful information about how humidity works: https://youtu.be/j_QfX0SYCE8