I rarely maintain my bearings mostly because i like running them dry.
All i do is clean it with acetone (ask ur parents kids) let it dry. And mayyyybe, just maybe put a tiny drop of sewing machine lube in it.
It plays a little responsive for like an hour (cant hit slacks too well without a knuckle buster every now and then) but then goes pretty responsive.
I use the tug method to tell if its broken in. Just tug your throw like you would for a responsive return to your hand, an if the string winds around the bearing a little but doesnt bind by itself you still have a little bit to go. From there i just play the yoyo, pretty hard too, really fast. Then after a bit i tug it again and viola the string doesnt wind at all.
As far as people not liking loud bearings, sometimes its inevitable yo. Ive had the same KK in most of my throws for 5 years and it hasnt quieted down a bit. You just gotta deal with the noise. I dont notice it anymore.