I give up....

You can imagine the conversation -
"Wipe your face"
"I have"
"OK, wipe your head"
"Why?"
"You've got cake on your head"
"I just wiped my face"
"You missed a bit. Let me get it"
"No I'm a big girl, I'll do it"
"No, not round your mouth, on your forehead"
"Where?"
"Up here"
"What you saying"
"Oh just go and play"