I have a large capacity top loader, so I wash even king-size quilts in it, gentle cycle, cold or warm water. Sometimes I use Orvus paste, sometimes regular detergent, no fabric softener. I do pre-wash my fabrics. I agree with testing the fabrics in your quilt for bleeding, and if there are problems use Synthrapol in the wash. I put the quilt in the dryer until it's almost dry (low heat) and then (if I remember to take it out in time) I spread it out on the floor to finish drying.