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1ea Citric Acid Cleaning Filter Cartridge for Tyent Rettin Ionizer MMP Series 5050/7070/9090/11T; Made in Korea; "MUST HAVE" in order to maintain the long-term performance of your Tyent water ionizer; Using Cleaning Cartridge at least every 12~18 months; -How to use- 1. Power off the water ionizer. 2. Open the back cover to access the filter compartment. 3. Remove the second filter (Green Labeled filter). 4. Install the cleaning cartridge in the place of the second filter. 5. Adjust the water flow to full pressure. (Water must be warm. If water is cold, the cleaning time must be a few minutes longer.) 6. Turn on the water ionizer. 7. Run the machine in the mode of "H2O" mode for 25~30 minutes. (Never run the alkaline or acidic setting. ONLY use the "H2O" setting.) (If the safety cuf-off occurs after 15 minutes, please touch the "H2O" again for another 15 minutes) 8. Power off the water ionizer. 9. Remove the cleaning cartridge and install back the second filter. 10. Turn on the water ionizer. 11. Run the machine at the "H2O" settings with "cold" water for 5 minutes. 12. Please check the flow and the PH level.

Cleaning Filter Cartridge Compatible for TYENT Rettin Ionizer MMP Series 5050/7070/9090/11T - B018R4RKK8