T.G.
Well, this just might work...My son went through the monster phase at 3. So, I gave him a bottle of "magic monster spray". I got an empty spray bottle at Wal-Mart and wrote Monster Spray and Repellant, Guaranteed to Work, Extra Strength, etc...and then gave it to him. It was weightless, so his first response was that it was empty. I reminded him that is why it is magic, because it is invisible and weightless. Every night we sprayed the whole room, and wola..no more monsters!