I went in my daughters room the other night Because I kept smelling strawberry shortcake lingering out of there. well I thought she had my oil in there or tarts, but no I coulnt find anything but as Im walking over her air vent in the floor I noticed something red sitting down in it, she had place 2 aroma bead ornies in the air duct. So she is determend to make vent scent blocks.:rolleyes2