I put some cute little curtains that I made on my coop. I was told I must either remove or wash them EVERY week because they will collect mites or virus?? Is this indeed correct?? Should remove them?? Can I just tie them back to leave the window totally exposed to get more fresh air?? They're NOT closed now even?? They're open a little in the middle.. but I'm thinking I can tack them completely back on each side of the window?? I HATE to have to take them down, however I want my two chickens safe and will do whatever you suggest. Thank you SO much for any advice you can give me as I'm a first time chicken owner. My girls are 12 weeks old now.