We are using the Beta 53 headworn mics in some of our shows and wanted to see if there was any cleaning that you recommended or that would be OK. Particularly for the build up of salt from sweat.
We have noticed a slight reduction in sound quality after some time of use
We endorse the distilled water idea but suggest a misting instead of a dunking. After cleaning, make certain the mics have time to dry thoroughly.
Consider storing the mics in an airtight box that contains a silica gel packet. Silica gel is a desiccant and will absorb moisture in the box. Silica gel packets can be reused indefinitely if they are dried out regularly in a low heat oven.