If you put them in your washer, be prepared to find a bunch of threads afterwards. I starch pretty much everything before I cut into them including pre-cuts but I dip them in my starch mixture and then put them thru my home-made wringer so small pre-cuts come thru almost flat and smooth. The rest of them I hang to dry and them press. Even putting yardage thru a wash machine is difficult due to all the loose ends becoming a ball of threads. Tried trimming the corner off as suggested and it didn't pan out well. I've serged the cut ends once upon a time but that's a lot of wasted thread and time but it did work. Again, now I just put thru my starch mixture and call it good.