I wash mine in Woolite in pretty warm water, but I use the kitchen sink. I sort by similar color and just swish around a couple of minutes and then move to other sink to rinse and rinse until no more color shows in the water. Then I roll up in toweling to absorb excess water and then iron. I do the process this way to avoid getting so many thread strings and to keep collections together when I buy several pieces from one line of fabric. So far I've been very pleased with the results. If you buy large yardage pieces, this may not work for you. I think the largest piece I've washed this way was about 5 yards.