What should I do if the explosion -proof hand stubbu is very laborious? When using it, be careful not to overload it. The overload will be damaged by the opponent's chain and parts of the gourd. If you have to pay attention not to be caught, you will also damage the parts. Then be careful not to have debris into the inside of the gourd, so that the ruler wheels do not run smoothly. Pay attention to cleaning on the surface of the chain. Do not have mud, prevent mud from bringing the inside of the gourd through the chain.