When we clean commercial glue-down carpet we put all we have to use. We vacuum with a commercial vacuum. Then we prespray with a safe but powerful enzyme based agent. This is crucial: we agitate with a pile lifter or counter-rotating brush machine which safely digs all the crud that the vacuum cleaner only wishes to remove. Then we extract at 300 degrees and 500 psi with deionized, soften on-board water. Last, we post bonnet "polish" the carpet to minimize wicking. We typically charge 0.43 psf but that can vary depending on economies of scale. If you are interested in the same service for your estabishment, please call 360-280-2171 M & txt.