I grease it about twice a year, and clean any gunk from the nozzle (takes a few seconds) every so often. I wash the print bed thoroughly about 3 or 4 times a year.

I'm interested in 3D printing, but not interested in fiddling with the printer itself. So, I have fiddled to print soft rubber filament for example, but for every experiment with something strange like that I have 50 or more routine prints in PLA or PETG.