Hi ya'll! I have a five-year-old Hayward TriStar VS 950 Omni Variable Speed Pump, and it recently occurred to me that I haven't touched the thing since its installation in 2019 (besides regularly cleaning the pool pump basket). I was wondering (and apologies for the n00b question)... do these pumps call for any kind of routine maintenance? Does anything need to be lubricated or cleaned or adjusted? Or are these things basically sealed units that are designed to run until end-of-life without any user intervention? THANK YOU.