Stanky Vapes does not offer a lifetime guarantee. Why? Because we offer quality products cheaper than all of our competitors. It would be cheaper for you to order a second product from us than purchase a lifetime guarantee from one of our clients. Do the math, check it out. Now, if it is within 30 days and your provide video evidence of failure, then we got you. We will replace it for you. We love our customers and want you to tell everyone about us.