Originally Posted by MacThayer

I always wash in warm water and dry completely in the dryer to make sure I've shrunk it to the fullest extent (and even that's not an iron clad guarantee.) Upping the water to hot does not seem to make a difference in shrinkage. It's the drying to complete dry that seems to make the most difference.

I iron on the cotton setting with steam. Take care you're just "pressing" and not ironing, which could stretch the fabric out, and you don't want that, because it will "spring back" when given the chance. By that I mean, do more of "lifting and setting down of the iron" than sliding your iron around, until the fabric is mostly smooth on the side you're working on. By then, a little sliding around of the iron won't hurt because the fabric has been "set". And I mean a little, just to smooth things out. Whether I press one side or both depends on how wrinkly the fabric is, how thick it is, and what my purpose is.