VXL 70 and VXL 90 are comparatively soft materials. If the feeder tension is not ideally set, it can lead to abrasion on the drive gears over time, which can get stuck between the teeth. Consequently, the drive gears may no longer grip and feed the filament properly. It may appear as if there is clogging. For example, using compressed air is effective in removing abrasion from the drive gears.