Thank you Aj so much for the feedback, you posted on the Home Depot website. Moen takes consumer comments very seriously and we are delighted to have the opportunity to assist you. Unfortunately, cartridges do not have a life expectancy as a number of factors can cause them to fail including quality of water, debris passing into it, and amount of use. I would recommend ensuring that the valve is cleaned and flushed prior to installing the new cartridge, which should help prevent them from failing so quickly. For warranty assistance, please contact Moen directly at 800-289-6636. Our current business hours are Monday through Friday from 9:00 am – 5:30 pm (Eastern Time).