A few other things to bear in mind...
Once the screen has properly misted up, you will get a Defrost button, however it's more fun to hold down the left mouse button and draw or write in the condensation. Please note that no defrosted area will mist up again, and that you cannot use Google normally until you've clicked Defrost. In addition, this doesn't seem to work on my Gingerbread phone with the built in browser, Firefox or Opera Mini. Not exactly surprised, though.