Xiaomi tooth punch is broken inside, method: one hand is responsible for holding down the replacement nozzle button and inverting the tooth punch, while the other hand is responsible for pulling out the waterproof plug. Make sure to press the nozzle replacement button to the end, and make sure to hold down the nozzle replacement button at the same time. Otherwise it will break. When the strength of the hand is not enough to pull, you need to use a vice or needle-nose pliers. If not, you can screw a self-tapping screw screw can not screw in the end, because it will burst the nozzle buckle.