You can clean it with ETOH, then rinse with water. Most tanks can be cleaned using soapy water, then rinsed thoroughly.
I think it's just good practice to bring alcohol wipes with you if you are going to share your vape. I will not do that, but if I did, I'd use a wipe before handing it over (who knows what germs I am incubating) and after getting it back. It's just good practice (IMO), there are several things that can be transmitted via saliva. I do hope you feel better soon.
Mods don't generally need much cleaning (other than the exterior maybe, and what you'd use depends on the finish) unless e-
juice runs down inside the 510 pin or something...
There are folks who use ultrasonic cleaners for their equipment too. I don't know much about them, but they sort of vaguely sound to me like a useful (but potentially expensive) item to have....
Feel better!
Anna