I am of two minds. Do not wash it, use as is. OR wash it in the washing machine, on the gentlest cycle you have available WITH the Color Catchers. I have a front load that has a hand wash feature I use with my old quilts. BUT I wash them all, I know what I have will be used. I cannot worry about each piece. If it survives the washer, it's a keeper. If it doesn't, it was not meant to be. Life is too short to worry.
I also, throw in the dryer, after it stops, I hang from the balcony for 24hrs to ensure dryness!