Hot water extraction is often called steam cleaning, which undersells it. The heat and water are only the delivery mechanism; the actual soil removal comes from chemistry, agitation and suction working in sequence.
Skip or reverse any of those stages and the carpet looks clean wet and disappoints dry. This is the order we work in and the reason for each step.
The short version
- Inspection first — fibre type dictates everything that follows
- Pre-spray needs dwell time to release soil chemically
- Agitation moves the chemistry down to the fibre base
- Extraction with a controlled rinse removes soil and residue together
- Managed dry-down prevents wicking and rebound soiling
1. Inspection and fibre test
Wool, wool-mix and synthetic carpets tolerate very different pH levels. Getting this wrong is how carpets end up bleached or felted, so we identify the fibre and test in a hidden area before anything wet touches the floor.
2. Pre-spray and dwell
A fibre-appropriate pre-spray is applied and left to work for several minutes. This is where the soil bond is actually broken. Rushing the dwell time is the single most common reason a carpet dries back grey.
3. Agitation
A brush or rotary tool works the pre-spray through the pile so it reaches the base of the fibre rather than sitting on top of it. Traffic lanes always get extra attention here.
4. Extraction
Hot water and a rinse agent are injected under pressure and immediately vacuumed back out. The rinse is as important as the clean: leftover detergent is sticky and attracts new soil within days.
5. Spot work and dry-down
Anything still visible after extraction is treated individually — tannin, protein, oil and dye stains each need their own chemistry. Air movers then bring drying time down, and anti-wicking pads go on any spot that has previously rebounded.