How do you remove Kool Aid (and other synthetic food dye) stains from carpet? Red Relief, that’s how. With the hustle and bustle of daily life, we put our carpets through quite a bit. So what do you do when you encounter a tough to handle stain like Kool-Aid? Wondering how to get red stains out of carpet? Be careful what you apply to these stains because the wrong product can set them permanently. It’s much better to reach for the right product the first time.