Prior to cleaning your polyurethane foam couch you will need togather the materials and tools that you will need to complete yourtask appropriately. This will include a vacuum with an upholsterybrush attachment, fabric cleaner, spray bottle, a hose and spraynozzle, handheld shower head, fan, hydrogen peroxide, baking sodaand an enzyme based odor neutralizer.Step 1. Before you can clean your polyurethane foam couch, youwill need to remove any upholstery covers that may be covering thefoam. Vacuum the surface of the polyurethane foam cushionsthoroughly using your vacuum and the upholstery brush attachment toremove any debris, dust, mites or dander that may be in thecushion. Wash your upholstery covers in the washing machine if theyare machine washable. If not than you will need to wash them