The vibrato of Yajia flashlight disappeared.

There should be a short circuit between the Tik Tok pieces in the mouthpiece, which is caused by saliva entering. Remove the mouthpiece, clean the two rattling metal pieces and keep them clean. Blow the shaking pieces with a hair dryer to ensure that the two shaking pieces are dry. The reason is that there is an insulating plastic sheet between the two metal sheets, and capacitance is generated between the metal sheets. If water enters, the metal sheet will be short-circuited, resulting in the disappearance of capacitance and vibrato.