Here at Sunflower King's Farm, we are certified Naturally Grown. That means we cannot use any pesticides. As you can imagine, knat bites have been a major problem for anyone working in our fields or greenhouses. Since we started using your Bug Off!, the knats are no longer a problem. I recommend your products to everyone. They make both outdoor work and play a more enjoyable experience. Thank you so very much for a terrific product.