Washing your sofa yourself is not recommended due to high risk of damaging the upholstery. However there are some tricks you can use to avoid real washing procedure. Make a solution from hot water and a few drops of appropriate cleaning detergent. Take clean sponge or cloth and damp it in the mixture. Then squeeze until it is almost dry and carefully start wiping your sofa’s surface. This should refresh upholstery’s fabric and deodorize it.
If you have any doubts that the fabric is moisture sensitive or the detergent is not suitable, skip this step. After all, you want to clean your sofa, not ruin it. If the upholstery stands water well but your detergent is too strong you can replace it with laundry soap.