This stuff is amazing, we have light grey and white carpet and my Westie vomited yellow sinus stuff on it. I blotted the mess the best I could and then sprayed my pet peed on it let it set a couple of minutes blotted it up, I did this a couple times then I let it’s dry and there is absolutely no yellow or smell like with other cleaners I would highly recommend it. Remember don’t rub it or the mess just pick up what you can and spray and bolt it until it’s all gone