how to fix spinner middle cap loose problem?
there is a screw in the middle of the spring. after you play it for a long time, maybe the screw will be loose and the middle cup maybe drop down. you can use screwdriver to tight the little screw on the spring, then tighten the big screw in the middle of the spring. like our video. then it will be ok. by the way, if your spinner is made of brass or copper, it maybe got oxidized by air, you can make a drop of olive oil on the spring to protect it being oxidized. ebay store: moon1697