How does urineFREE remove urine odours originating from stains buried deep down in a carpet

urineFREE treats and removes urine odours that orginate from deeply buried urine stains by seeping down through the carpet to the underlay and floor to get to the urine deposit. Always spray or stream sufficient urine remover to ensure the top of the carpet is soaking wet.  As this happens, the urine odour may initially be stronger and the colour darken as the urine rises to the surface. This is common and repeat applications will get it all.