Do Cell Phones Give You Acne?

I overheard this conversation between my two kids yesterday.

He: Why do you use your Iphone on "speaker mode" all the time?

She: I have to; if I listen and talk into it, I get acne. Bad. On that side of my face.

He: (sighing) You should wipe your Iphone off with special wipes that won't hurt the screen. Everyday. Then it'll stay clean and you won't get acne.

She: That' won't work. It's really bad.

He: But you can't hear what the other person is saying very well; it's all garbled. That's why no one can ever understand you.

She: No, it isn't.

Sigh.  What do you think; do cell phones give you acne? Turns out they are both right.