These car diffusers work wonders. Not only do they last 2+months they are stylish as well. Directions: 1. Screw off the top cap, and attach this to your car mirror FIRST. 2. Once attached pull of container plug and gently attach it to the top base. 3. Once attached tip the whole container just quick enough for those yummy-smelling oils to soak into the block of wood. 4. Every so often when the scent fades a little just tip over again, and boom! EACH ONE WILL COME WITH AN INSTRUCTION CARD TIP: If you notice the diffuser swinging a lot while driving we recommend that you tie the cord shorter to ensure no spilling or waste of product.