Have heard a bunch of times not to use brake cleaner but the day after every race I clean with brake cleaner and let dry while im cleaning the karts then after im done withered the karts I put 3 good coats of wd-40 then the day im loading up I lube them with my lube. Never had a problem and been on the same sets for 3 yrs. No rough roll, noise, or tight spots.
There is a tech sheet on PRC's website for care of ceramic bearings. Basically it is clean with meneral spirits, rinse with alcohol, blow them out and then lube with the ceramic bearing lube. not complicated at all.