I use Orvis to wash. Mine usually have glue spray to hold the sandwich and I often "Elmer's glue" the binding before sewing so this must go. Depending on where you live, cold water can have different temps due to the groundwater temp(gets slightly higher as you move to the south) so I like warm water. I take mine to the dreaded laundromat ;-) where I can use a front loading machine that lifts and drops the quilt rather than twisting it as it would in my top loader.
The clothesline is my favorite place to dry, weather permitting. And this allows good light to inspect for stray threads, a separated seam or other repair that might need to be done.