The most common question typically is related to routine maintenance of 3D printers.
Generally maintenance is minimal: cleaning of extruded plastic, filament, duct cleaning make sure by Visual inspection of the operation of the fans.
Occasionally, and also depending on the hours of printing, the state of tension of the belts should be checked, this check is urgent in case you encounter slippage on the axes.
Even more rarely is the lubrication of the guides, thanks to the high quality of the same, must be done only in sporadic cases.
If necessary, you just have to use products such as silicone oil with added Teflon.