Simple Solution Advanced Spring Garden Stain Odor Remover, 32 oz = $5 at Walmart. Trust me when I say I am an expert at pet stains. Today, I bought a black light - to see what I've been "missing". Three places that I cleaned last night with this stuff - NEW stains - did NOT fluoresce , whereas other places I had cleaned before with other products did glow with the black light. I'm impressed!