1. If there is a problem with the circuit soldering of the touch switch, you need to carefully check whether there is a solder joint on the circuit board of the touch switch, and repair it in time; whether the electronic components are burned through, replace it in time; perhaps directly replace it. The problem of the touch switch circuit board.
2. When there is dirt or water entering the tact switch, you only need to remove the corresponding tact switch shell to check whether the water in the tact switch is severe and not severe. You can use a desiccant to suck away the moisture. If it is a stain, scrub it with alcohol, and then install it after the alcohol evaporates. Do not damage the equipment again. If the water ingress is severe, you can consider replacing a new tact switch with the same specifications and functions.