Running them through the spin cycle in the washing machine with the water turned off, is how I do it. That will save a lot of work if your doing it by hand. When you mix the dye add a handful of table salt to the mix. That will help the dye form a permanent bond with the fabric. Only use high quality fiber reactive procion dye made for tie dyeing. Throw that Rit Dye in the garbage where it belongs lol.