Why is my Magimix Cook Expert glass lid leaking? 14 September 2023 06:03 Updated Check that the seal is properly slotted in the rim. Check that the seal is not damaged. If you are heating milk, reduce the amount (milk can easily boil over, just as it does in a saucepan). Related articles What does the 30-year (or 1000 hours of use) motor warranty on my Magimix Cook Expert correspond to? What does the “Close the lid” message on the screen of my Magimix Cook Expert mean?