... balls around the house for years now and i just started keeping them all. I have no clue where they are coming from but suspect it might be my vacuum. I can't find anything online about vacuums and ball joints. I normally find 1 about every week. Today while vacuuming I found 1, stopped and went to go put the 1 metal ball with the others. When i came back to the vacuum I found 4 more right where the first one was found! This drives me insane!