1、 If there is a problem of faulty soldering in the circuit, you need to carefully check whether there is faulty soldering in the solder joint on the circuit board and repair it in time; Whether the electronic components are burned through, replace them in time; Or replace the faulty circuit board directly.

2、 When there is a stain or water entering the tap switch, you only need to remove the corresponding equipment shell and check whether the water inflow of the tap switch is serious. If it is not serious, you can use desiccant to absorb the water. If it is a stain, wipe it with alcohol, and then install it after the alcohol volatilizes. Do not damage the equipment again. If the water inflow is serious, consider replacing a new light touch switch with the function of the same specification and model.