Myces was shown to be quite strong for a fairy, and proud of it. But there is "for a fairy" in there, and glass is not that fragile!
Leave it to a child to figure out all the different ways one can use a broom or mop. None of which are ways in which it was designed for!
And the way it was designed for is to turn it upside down so the mop looks like a hairy head and put googly eyes on it, right?