Depends on if DH is there with me or not. If he steps up to take care of it then I stand by him and say nothing. But if he is not there, then I say, "Stop _________." If she refuses then I tell her no computer/ipod/etc for that night and if she chooses to continue, I make sure she knows tomorrow's usage is also on the table to be taken away. Should work in theory, but never does because of DH intervention of not following through the next day! Ugh! So frustrating.

What have you tried? What was the result?