The Seed and Hull Protector from Care Free is a great way to ensure your birds are as happy and healthy as possible. Oftentimes bird feeders can be a little bit messy–after a time a small field of unused seed tends to gather beneath the feeder. This unused seed can rot, mix with bird droppings and become otherwise infected with harmful bacteria if left untended too long. This spray from Care Free is meant to remove these harmful contaminants, decomposing and dissolving the seeds and husks so that they are left alone and can be reabsorbed into the ground. This 32 oz. bottle will last you a long time! A great value.