(1) Check the hearing aid battery.
See if it's because the hearing aid is broken or the positive and negative electrodes are installed backwards; Or the battery door of the hearing aid is broken and needs maintenance; Or because the battery compartment of the hearing aid is unclean and corroded.
(2) Check the hearing aid ear mold
You can check whether the ear mold of the hearing aid is blocked. If it is blocked by earwax, you can clean the surface with the cleaning brush of the hearing aid. You can also take the ear mold and clean it, then dry it and put it on.
(3) Check the sound guide tube of the hearing aid
You can check the sound guide tube of the hearing aid to see if there is any sound in the hearing aid. Is it because it is wet? If the hearing aid is wet, it is mostly caused by the user's ears sweating easily or the surrounding environment is wet. Just pay attention to cleaning and drying regularly after use.