Nope! I like the crispness of new fabric and the crinkled look after the project is finished and laundered. I have four quilt inspectors--two cats, Mehitabel and Maude and two Yorkies, Booger and WookieDoodle--so if I prewashed and then laundered after the project is done, what I make would be pretty well used! Booger and Wookie dragged some strips I had cut out into the grass and I washed them and wound up with a frazzled mess that I eventually threw away. Washing precuts does not seem like a good idea to me. froggyintexas