Just got my Moda Jelly Roll that I won on eBay!! I bought the rest of the yardage and now I question what to do about pre-washing. The yardage I bought is brown, will it run? I can wash the yardage but what about the strips. Some of the strips are the same brown and there is a dark red. Will I have a problem pre-washing half of my fabrics? What have you all done?