So this question came up today while conversing with a fellow brewer..... Let's say I make a yeast starter from a white labs vial. What if I put some of the starter back in the vial and in the fridge? (cleaned and sanitized of course). Would it be sufficient to pull it out later and make a new starter from that? Or would it be too diluted to do anything with it? (I'm thinking, diminishing returns, it probably fail pretty quickly unless you did a multi-step starter for something high gravity followed by a lower gravity brew that didn't require as much) ????