UVC lights are wonderful for killing 99.9% of germs and bacteria. There are all kinds of powerful models on the market. This UVC Light Module plugs into your phone’s Lightning port and turns it into a disinfection lamp. You can use it to sterilize any surface in any room.
This UVC iPhone Light has a wavelength of 275nm-285nm. No need for a separate power source either. You can get it for under $5 on sites like Banggood.