What you Need: 4 C warm water, 1/2 C vinegar, and 2-3 Tbsp baking soda. What you Do: mix above ingredients together and let it fizz a little. Dip a scrub brush into the mixture and gently rub the spot in the carpet until gone. Once it dries just vacuum up the residue left behind. It is best to test a small area of your carpet before putting anything on it to make sure it doesn’t cause it to change color.