Releasit. What one for residential carpets

[Act One Cleaning]

Well, yes. Punch will get you through most any soil, leaves a polymer protectant and is a bit more expensive than DS2 to use because of its dilution ratio. It makes an outstanding spotter, and I leave a mixed spray bottle behind for customers.
HyDrox is unbeatable for browning and organic stains. It does not leave a polymer protectant but is an amazing brightener and will absolutely amaze your customers. DS2 is the all-purpose goto and is powerful, economical and dependable. Don't be cheap. Measure, don't glug; it will be utterly predictable and you will quickly learn how to step up the ration if needed. Always mix over a sink, not the carpet. Good luck!