Heavy-Duty Carpet Stain Remover & DIY Professional Cleaning Kit

The user has a tough carpet stain that regular cleaning products couldn't remove and is considering professional cleaning. This indicates a gap in the market for a consumer-grade product or kit that achieves near-professional results for deep, set-in stains. A 'heavy-duty' or 'pro-strength' carpet stain remover that targets various stain types, perhaps combined with a small, handheld, effective DIY 'steam-like' cleaning tool, or a multi-step cleaning system that emulates professional methods, would be beneficial.