We use our own machine. I have had luck with the enzyme cleaners. Let them soak for a half an hour, then shampoo as normal. Next time you notice that the dog left a puddle on the carpet, soak it up with a dry towel. Then spray heavily with the enzyme cleaner (petastic is one), lay a dry towel or two on top, and something heavy on top of that. (we turned a stool upside down). Just forget about it for a few hours. Stain and smell will be gone. If it is an area rug, you can also put a dry towel underneath the rug.