Your phone is disgusting, and it isn't going to clean itself.
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Scientists at the University of Arizona found that cell phones carry at least 10 times more bacteria than toilet seats. Since your phone is an extension of your hand, that thing directly or indirectly touches all the things your hands touch. You should really consider cleaning it regularly, especially with the rapid spread of COVID-19, the flu, and all the other nasty bugs going around.
Aside from cleaning it with bleach, rubbing alcohol, or soap and water, one way to do it is with PhoneSoap. PhoneSoap does what is sounds like it would do—it's a device that sanitize your phone for you, killing over 99 percent of germs, and it'll do it while simultaneously charging it.
UV-C lights inside PhoneSoap sanitize the phone without the use of heat, so there's no risk of harming the phone. Also, it doesn't just sanitize phones, it can clean anything that'll fit inside: keys, credit cards, pacifiers, etc.
The company offers several devices, all of which are currently sold out due to the high demand, but they'll be back in stock in April and May. Click here to preorder, as it's always important to keep your devices clean, not just during a public health crisis.