Probably one of the hardest stains to remove is “water-based red dye stains.” Kool-Aid is one of the hardest, if not the hardest, stain to remove from carpets.
Try the following steps to remove a red dye stain:
You can also use the heat transfer method whereby after applying the remover place a clean white towel over the spot and place a steam iron on top of the towel to draw out the red dye or better yet, use a vapor steamer to lift the stain out of the fibers.
If this doesn’t work you can attempt these steps: