I have just started brewing all grain, and I am about to start kegging. I plan on fermenting naturally (using sugar), at least for now. My question is... I've read in many posts here that you should bleed the air out of the keg with CO2 before storing... why?? When you bottle, there is air in the bottle, what would leaving the air in a keg till you tap it matter? Thanks in advance for answering this!!