Desktop 3D printers rely on precisely lubricated lead screws and linear rails to build objects layer by layer, but these lubricants face a unique challenge: they must never attract dust or debris that would create bumps in the final printed object. Special low-viscosity synthetic oils and PTFE-based greases are used because they stay clean and won't migrate onto the hot print bed, where temperatures often exceed 100°C. The printer's axes can move back and forth thousands of times during a single print job lasting hours or days, requiring lubricants that reduce friction without breaking down from constant micro-movements. Many hobbyists unknowingly use the wrong oils, leading to layer inconsistencies and failed prints, when proper lubrication could have saved hours of wasted printing time.