Perhaps a silly question, but how do you prefer to clean your phone? I was thinking that a nice UV light station would be the lowest effort cleaning solution, and less irritating than rubbing it with an alcohol sheet everytime I get home.
In my case, I own a Cosmo Communicator which has a qwerty keyboard, which means I have to be a little less liberal with the alcohol, and I usually use a tissue. But it still takes less than 10 seconds. Squirt, wipe, done.
That said it would probably still be better than UV as the UV might actually damage the screen especially if it’s an OLED one.
Overall if your phone is IP rated some dish soap and a moist cloth is probably the best option.
But again, it's not too much, just to wet the surface and wipe well
But if you don't have either of those, you shouldn't be using your phone in a non-sterile environment.
In general I wouldn’t trust consumer UV bulbs (especially the generic Chinese ones), it’s not worth the risk you have very little way of verifying the actual frequency range and power of those bulbs so they can range from non effective at all to Chernobyl without you being able to tell.
The potential risk from a “true” UV bulb and a high power at that is much greater than COVID you can easily get eye damage including blindness as well as really bad burns and potentially cancer from a high enough dose of UV.
The ~400nm UV sources used for curing resins and nail polish might be your safest bet but I wouldn’t bet that these would be as effective as using sanitizers or water and soap.