How tight the lid? Questions › How tight the lid? 0 Vote Up Vote Down John Cosgrove asked 4 months ago When making a starter from fruit, Do you want the lid to be on tight or loose enough to let the CO2 escape? 1 Answers 0 Vote Up Vote Down Boris Staff answered 3 months ago Hi John, Sorry about the delay in reply, I only just discovered your question. Something must be wrong with the notification system. Anyway, the lid is just to give it cover from dust etc. No need to retain the CO2. Good luck with it.