Put us to the test! Order and use our 4-liter jug product (1 gallon) for up to 30 days, risk-free. Try it out and see what happens for you – we think you’ll be pleasantly surprised. If you are not 100% satisfied, contact us at info@dustoutus.com to take advantage of our 30 days full product refund satisfaction guarantee. Orders over 1 gallon will are not be eligible for refund.