If it’s dirty, I wipe it with a microfiber cloth. I don’t wash it or anything, after all I’m the only one touching it and I wash hands and keep regular hygiene. If I’d be working in a hospital or other place where increased hygiene would be necessary, I’d do it more often. When I still work in the kitchen, I just left my phone in my locker, washed my hands before my shift (and during of course) and it’s not realy a big deal.

People shouldn’t obsess over germs that much.