My No4 (dd2) is 17 months, and has just started a terrible habit of shrieking at the top of her voice. She seems to do it when she's cross, when she wants something, when she doesn't want something, when she doesn't want handling (i.e facewiping, hairbrushing etc)and when she wants attention. It's driving me mad, and I have tried ignoring it, saying 'no', saying 'shush' and other equally ineffective ideas. None of the others did this, and she's the first one I've been at home all the time with, and I keep thinking it must be something I'm doing wrong. Anyone else had this problem?