This window sticker fly trap is specially designed to attract flies and control fly activity indoors. It leaves no trace when removed from the window. Features and Benefits: Insecticide free Ideal for all rooms in the home to effectively get rid of flies Ideal for the greenhouse too Kind to the environment and to you Contains 4 stickers How To Use: Take care when positioning this sticker on windows where blinds are in close proximity, as glue may stain fabrics or plastics. Window cleaning products and other chemicals may react with the glue, therefore, always apply this sticker to a clean, clear window. This product may not be suitable at very high temperatures above 40ºC. In the event of an incident, the sticky glue can be removed by using vegetable oil.