The term “Velvet” refers to a smooth, woven tufted fabric which is traditionally made from Silk. Other fibers such as cotton, wool, rayon, polyester and nylon can also used. Constructed using special looms, the local carpet cleaner offering furniture and upholstery cleaning may not fully understand “how to clean Velvet Upholstery”.
Always consult any tags or instructions that have come with your furniture, they may contain special codes such as “X”, “W”, “S” or “S/W”. This information corresponds to the recommended cleaning method, i.e., vacuum only, wet, dry or both wet/dry.
For routine cleaning and care Velvet should be gently brushed in the direction of the nap, lifting the pile with a fine bristle upholstery brush, vacuumed and then dusted with a soft cloth to remove any remaining fuzz. Brushing the face at 90 degree angles and finishing in the direction of the nap should remove distortions and restore some of the appeal. 
Velvet is susceptible to crushing and pile distortion so pay careful attention especially when vacuuming. Swirling air from vacuuming rarely causes a permanent distortion on the sides of upholstery cleaning tools, but care should be taken to test a small area first.
When cleaning fresh spills, try to shake off most of the liquid if possible. Avoid “crushing” the area by using a white towel to absorb the spot rather than blotting. Spots, spills and stains that have been absorbed or allowed to dry require a more thorough inspection of the problem. You can try mixing a few drops of mild detergent in a bowl of water and brush the foam on the area with a dry white cloth. You can also try a dry cleaning solution and gently dab the spot with a towel and always follow the directions provided.
I highly suggest that velvet fabrics made from natural fibers be cleaned by a professional upholstery cleaning company. An IICRC certified cleaning technician should carry a full complement of brushes, groomers, towels, sponges, cleaning solutions and equipment. Residents of Northeast PA with questions about caring for fine furnishings can contact Services Etcetera Carpet & Upholstery Cleaning, an IICRC Certified Textile Cleaning Firm based in Hazleton.