I too am a pre-washer. Anything hat I think might run, I wash with Retayne. I turn my hot water heater up on high, put my fabric in washer then fill my washer let agitate a couple of minutes, then let it set with lid closed for about 3 hours or more, then let it finish agitating and rinse. Then I wash as usual with a color catcher and if it still bleeds, I repeat and do again. If the fabric continues to bleed, I destroy fabric and get different fabric. I know this seems like a lot, but with $14 plus a yard it is worth it to me. I do turn my hot water heater down after my machine fills, as I do not want anyone to get a hot water burn.