I'm making another hat for Tehila (crochet). I'm not using a pattern. The top of the hat is starting to cup a little. I don't know if I should start over or if I should just stick something heavy on it - like a refrigerator say - to see if that would flatten it. Or, maybe it's not major enough to make a difference - she is only 5 and it's only my 3rd hat or so.