If your water does not taste highly carbonated when selecting high carbonation there may be an issue with the CO2 cylinder installation. Please ensure that your Cylinder is correctly installed following the steps in our How do I insert the CO₂ cylinder? article.
If you are using a third party CO₂ cylinder please see our What CO₂ cylinders does Mitte Home support? article to confirm your cylinder is supported.
If these suggestions do not resolve your issue please contact Mitte Customer Success via our online request form for further assistance.