Filament Lubrication Filament lubrication involves applying a small amount of oil or lubricant to reduce friction as filament moves through the extruder. Some users lightly coat filament with PTFE-based lubricants to improve feeding consistency, especially with Bowden extruders. Lubrication must be used sparingly to avoid contamination or extrusion issues. It can be particularly helpful for brittle or abrasive filaments.
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