Review on BUBBAS Super Strength Enzyme Cleaner: The Ultimate Pet Odor Eliminator and Stain Remover for Mattress, Sofa, Rug, Laundry, Hardwood Floors, and More. Plus, Perfect for Puppy Training Supplies! by Leslie Smith

That's it, just buy it. I've been trying to get puppy stains out of rental carpets for a LONG time. I've even tried bleach. These photos were taken half an hour apart. The instructions recommend spraying on the stain and letting it sit for 10 minutes before wiping it off with a cloth. When I came back 10 minutes later I couldn't even tell where to wipe because the stains were already gone! I was hesitant to spend $40 on a carpet cleaner when the decision costs $5, but it's definitely worth those dollars!