The z-axis leadscrew will become dirty after being outside for a prolonged period of time. Excessive dirt and grime on the leadscrew can cause premature wear, a loss of precision, and missed steps if not addressed.
Every 6 months
Wipe the leadscrew clean with a damp rag or sponge. Applying a small amount of high quality synthetic lubricant to the leadscrew can help make motion through the delrin leadscrew block smoother and quieter. We recommend high quality synthetic lubricant such as that used for bicycle chains.