cleaning Knoll Executive Chair upholstery fabric  

Try damp cloth with mild soap if necessary and then dry after cleaning. Microfiber cleaning rags are a very useful method of cleaning fabric upholstery. If needed, seek professional cleaning. Use clear, cool water to help blot up resistant spills. Never use hot water because it tends to set stains. Never let water saturate fabric or pool in seams. To remove stubborn stains, blot repeatedly with water and a dry, clean, white cloth. Do not use cleaning solvents of any kind. Also take a look at an article on proper maintenance and cleaning of stains http://www.surplusfurniture.com/blog/how-to-protect-your-leather-sofa/.