I would suggest you wash it All. But do it in stages or you will be overcome with the idea of it. My line usually is full of everything I bought over a couple of months, unless it is some thing I need right away. Not all people do wash their fabric but I have found when I get a panic attack in the night it is good therapy to iron all the fabric, while my tablet I have just taken takes effect. I do not know why or when they happen but have found I'm not the only one who suffers this complaint. I would not wish it on my worst enemy, so enjoy what you have bought and Welcome to the Quilting Family.