I'm moving my older girls into a new smaller house this weekend because I have a whole bunch of chicks coming in a few weeks. I really want to clean and sterilize the coop to make it disease free for the chicks. I'm going to shovel, sweep, and vacuum the coop out really well, then spray it down with something to try and kill whatever beasties are left. What should I use? Bleach solution? Vinegar?