Wellis Air Disinfectant Extra Cartridge

Replace your Wellis Cartridge at least every 3-4 months. Remember, don’t hoard cartridges – they don’t last for a year. If you do buy an extra, keep it in the refrigerator. The cartridges are important – it’s the only thing you need to change … no filters for this machine. They last for 3 months but the machine will alert you when it is time to change.