Jenray Air Fresheners are extremely long lasting, with pleasingly unique high quality fragrances. They add fresheness and cheer wherever used: auto, home, office, boat, etc. For best results cut small opening in the top of the bag and pull string to hang freely exposing 1/3 of the air freshener. Each week there after pull freshener out further to adjust strength. Caution: Keep away from chlidren and pets. Avoid contact with wood, plastic, leather, fabric, & painted surfaces.