I use Best Press and press each piece as I sew and then the whole top before quitling. I like the crispy look and clean. To each his own. Just like I do not prewash and have never had trouble and use shout color grabber and it comes out ok too. I took Grannyp70 a half gallon of Best Press today and she is hooked. Of course we are working on the Farmers wife blocks and they are small so really helps.