Wet filament will ruin a print. Many plastics are hygroscopic (water absorbing). Their affinity to water differs but over time almost all will absorb water. Water absorption can cause problems in several ways
- Filament will expand therefore clogging the printer more easily
- Trapped water will boil off at printing temperatures. This is characterized by popping and clicking noises. This will lead to voids in the print, and increases wear on the nozzle.
- Wet filaments cause stringing artifacts. They are unsightly but may also snag during the print. This could lead to a print failure.
I mainly print in PLA. It does not have a high affinity for water but due to my location, Houston, and my environment, a very old townhome with undersized AC capacity, my filaments get wet quickly.
As is my style, that was a long introduction to show off this great print that I found recently. PrusaPrinter member P.Tech developed a snap fit desiccant canister that fits perfectly inside of filament spools. Sizes are easily adjusted with a parametric OpenSCAD file. These can be used during storage to maintain a dry environment. I prefer reusable desiccant beads. These containers work perfectly. I recommend printing 5 or 10.