I’m beginning to think this might be a lost cause. My puppy threw up on my living room carpet last week. I thought I had got to it quickly enough but there now seems to be a circle I can’t shift. I’ve tried enzyme pet cleaners, wet carpet cleaner, Dyson Dysolv and even diluted white vinegar. Unfortunately it’s not in a spot where I can even put a rug over it. Any tips gratefully received!