Hi there - We appreciate you choosing GE Appliances and taking the time to provide your feedback. However, we're sorry that the filters seems to last a shorter amount of time each cycle. We understand that would be a nuisance. We recommend replacing the disposable prefilter and postfilter cartridges every 6 months, at the rated capacity, or sooner if a noticeable reduction in flow rate occurs (plugged with sediment). Replace the disposable RO cartridge every 24 months, or sooner if a noticeable reduction in filtration efficiency occurs. We recommend viewing page 20 of the owner's manual here: https://images.thdstatic.com/catalog/pdfImages/9e/9e9258e0-2a7d-4cc3-bf83-758d4e4df63b.pdf. -- We hope this helps! We strive to provide the best quality and ownership experience, so please let us know if you need anything. Take care, Shayla@GEA