For best results, hang between the upper and middle portion of the tree toward the outer edge using the hooks provided, but make sure they are not in direct contact with any other ornaments. As with all fragrance products, this can create a reaction resulting in a damaged ornament. You can also tie the sticks with wire to the top of wreaths and garland, but just don’t let them touch furniture, floors, painted or finished surfaces, other ornaments, or most fabrics. There’s always some fragrance on the surface – and like ANY fragrance – it likes to interact with certain materials which may cause damage. A good rule to follow is that they can touch the greenery, the metal hook or wire, and the air, but avoid everything else.