Many of the links below are not specific to the Monoprice Select Mini.
3D printers in general will require similar maintenance procedures.
How to clean and lubricate a Monoprice Select Mini – 3D Printing Tip
Maintaining Your 3D Printer - LulzBot
How to get better results from your 3D printer - Maintenance - MakerBot
The 5 Best Ways to Maintain Your 3D Printer - Pinshape
Maintaining your printer - Ultimaker