LID OR NO LID?

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If you put a lid on your kefir you will get a more carbonated kefir, but your kefir grains needs oxygen to be happy and that’s why a tightly woven breathable cloth would be a better option. Some people use a lid and screw it up loosely but I just don’t want to take that chance because somehow I still think a determined little insect can still get in there if it really wants to. We are covering our kefir to keep dust and insects out and we can put a lid on it with the second fermentation to carbonate.