The carpets are vacuumed, followed by pre-spraying with the best quality eco-friendly, biodegradable chemicals from Solutions UK which is then agitated into the material. Any spots or stains will be treated. This is then water extracted at high pressure by THE MOST powerful portable extractor available in the UK - the Cross American Jaguar 8.4. This machine is so powerful it MAXIMISES soil removal and MINIMISES drying times for fantastic results, only leaving the carpets slightly damp. There is absoltely NO sticky chemical residue left behind.