u/doorandplant2

Will be going away for around 2 weeks and I've read that you can essentially leave the grains in a jar of milk and put them in the fridge and it will keep them fine for that duration of time.

My question is when putting them in the fridge, do I seal the jar with a plastic cap or just the regular breathable cloth? ( I use table napkin sealed with a rubber band when fermenting in room temp). I've seen recommendations for both so now I'm a bit confused.