@sdwff Thank you for contacting Thermador. We are sorry to hear that you are experiencing difficulties with your steam oven, and we apologize for any inconvenience. Moisten the seal in the tank lid with some water before using it for the first time. Fill the water tank to the “MAX” line with cold water. The tank holds 1.4 quarts (1.3 liters) of water. Close the lid until it snaps, then insert the water tank completely so the tank handle is flush with the tank holder flange. If you continue to have issues, please use this link to find an authorized service provider in your area: spkl.io/605442wnE. If you need assistance or if you have any other questions, please call our Customer Support team at 1-800-735-4328. Thank you.