I would not recommend Ozone methods of cleaning. The best non-destructive way is one Hospitals have used for years and that is UV-C light. A handheld unit will clean a mic in 2-3 minutes and without side effects. Phones are also effectively cleaned with units that will fit a smartphone.
Cheers and stay safe
This is a great conversation right here... Before our last show, we had a fill-in singer because our singer was out with the crud (probably not covid-19) so to be on the safe-side, I disassembled all of our mics, cleaned the foam with alcohol, and lysol, washed the screens. Let the dry. Did it again before the next gig with our full-time singer in place.
Ozone is great, it WILL kill the virus, but you have to insure it airs out. Put a fan on it blowing fresh air for a while, or blow a hair dryer across it.
Unfortunately, UV light will not kill the virus inside the foam. My ex-wife was a microbiologist and one of her projects was seeing how long viruses/bacterium, etc would live on surfaces and in materials.
I can insure you that spraying alcohol, vinegar, lysol or even bleach on the mic and even the foam will not work - it has to penetrate it. All the way through. Same way on all fabrics.
UV light will only get the surface, and not the inside - so, it may still be possible for a person to inhale particles that are impregnated in the foam.
Ozone machines on the other hand could penetrate it. Someone will probably build an ozone chamber for the music industry, just big enough to hold a dozen mics at a time, and create enough ozone to only affect the microphones and anything in the chamber, then auto vent it to the exterior, and flush it with normal air.
Great opportunity right there for someone! I think I will look into this! Better go trademark my company.
Karaoke Kleaner (tm)... Microbephone? ShureKlean!