Our citrus-based formula eliminates residual problems caused by steam and shampoo cleaning, so your carpets STAY CLEANER LONGER. First, we pre-spray the carpet with a light mist of CitruSolution so the carpet fibers are slightly damp. Next, we use an industrial buffer with a dirt napper system. This bonnet and brush system cleans the carpet fibers and wicks up debris from within the carpet. We finish by using a highly effective vacuum process that keeps dirt and dust particles within a filtration system.