If I had to wash, I'd never quilt! The only problem I've ever had was when DH was trying to help and started to put the quilt into cold water and before I'd put the Synthrapol or Color Catchers in. Hot water with the additives has always been fine. I'm a belt-and-suspenders kind of girl, so I do use both Synthrapol and Color Catchers, plural, when there are deep colors next to lights.
--Heidi
http://www.flickr.com/photos/32113973@N05/