Found this GCODE a few years back and found it very useful for cleaning/lubricating my smooth rods.
Demo:
I use this stuff: https://www.amazon.com/Super-Lube-21030-Synthetic-Grease/dp/B000XBH9HI/ Blurred out in pic as I'm not advertising for them, just stuff that works for me. :)
Run times(minutes):
x axis: ~1:25
y axis: ~1:11
z axis: ~9:18
I apply it with my fingers (stuff is food safe). Wipe off excess that gets pushed to the end of the axis.
I lubricate my smooth rods and a touch on my lead screws however the Prusa manual/documentation advises against this as the lead screw nuts are a type of material that's self-lubricating. My own risk there.
The author remixed this model.