I cannot produce any vacuum seal in the dish with my Keepeez LID. What should I do?
Please make sure the dish’s rim is flat. A non-flat rim will prevent the Keepeez LID from producing a vacuum in the dish. If you find the dish’s rim is not flat, please switch to a dish with a flat rim and press the LID’s center firmly into the dish to produce a vacuum. If the dish’s rim is flat, but you still cannot produce enough of a vacuum, please go to the answer for Question 3 below.