I know this is gross, but my cat pees on cardboard, somewhat vindictively it would seem. He peed on some purple cardboard and I caught him in the act, and when I picked the cardboard up, the purple dyed pee spilled on my carpet leaving a purple stain that I had no clue how I’d get out (not to mention the obvious smell). I’ve sprayed that spot twice and it has completely disappeared! Another spot of dog vomit that we had “cleaned” months ago with our spot bot, I sprayed the area where I remembered it being and it bubbled up and turned brown before becoming truly clean again. I haven’t taken another picture but it’s gone for good now, and I’m honestly grossed out that it looked gone before I sprayed it! Thank you so much! 15thousand stars! Highly highly recommend