One Drop 10-ball bearing

Yes, this has been my experience with my Onedrop 10 ball bearings.

They are never as quiet as they were at first, but they do improve. However, it does take a lot of playtime.

This isn’t just a OD 10ball thing; The majority of bearings out there will have some sort of break-in period as whatever little factory lube wears off and any minuscule imperfections on the balls smooth out. The “Play through it” method is a 50/50 shot. It can work, but if it doesn’t work or you just don’t want to bother with it then clean the bearing and it will play fine.