Probably two or three times a week, minimum, here.
Pretty much the same here, but ever since phones became waterproof, I started giving my phone (case and all) a washdown with dishwashing soap
Maybe once every 5 years when I get a new phone. My current one is about 4 years old. It doesn’t seem particularly dirty.
A few times a month with a Clorox wipe. Should honestly do that daily seeing as though I use it in the shitter. Also using it while in public, germy hands then touching the phone - yea, would probably be wise if I Clorox wiped it daily. Oh well!
I clean the screen with a microfibre cloth every day. Take it out of the case and clean it maybe once a week, if I remember to do it.
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.
