Taking care of your superfly's are important to repeated catch-ability. The flys are made of mylar and similar materials. These materials need to be kept clean and away from heat and sunlight. Use only non oil based scents and attractants. If water based scents and attractants are used, make sure to wash with non bleach and non scented type dish soaps. After cleaning let the fly's air dry out of the sun. After the fly is dry, I like to whip the fly to unstick the materials from each other. Slide the fly back into the case and store out of sunlight and heat.