I never heard of freezing juices... I have heard of putting them in the fridge. I just keep mine at room temp. I usually go though my batch that I make (about 300ml in about 3 months or less) and no drop in taste. I have accidently left mine in a hot car once with dirrect sunlight and that was discusting and I
threw it away because everything just tasted wrong. I dont think room temperature is bad of it but anything in excess will ruin the product.