The first and simplest step in maintaining a corduroy sofa's cleanliness is regular dusting and vacuuming. Use a soft, dry cloth or a duster to gently wipe away surface dust on a weekly basis. This helps prevent the dust from settling deeper into the fabric over time. Additionally, make use of the upholstery attachment on your vacuum cleaner to remove loose debris, crumbs, and pet hair. Pay close attention to the grooves and ridges of the corduroy, as these areas can trap dirt more easily. Vacuuming along the direction of the corduroy's wales (the raised ridges) can ensure that you lift out the dirt without damaging the fabric. Do this at least once a week to keep your sofa looking fresh.

Accidents happen, and when small stains appear on your corduroy sofa, it's important to act promptly. For liquid stains such as spilled coffee or juice, start by blotting the stain gently with a clean, absorbent cloth or paper towel. Avoid rubbing vigorously, as this can spread the stain and distort the corduroy texture. Once you've absorbed as much of the liquid as possible, mix a small amount of mild detergent with warm water. Dip another clean cloth into the soapy solution, wring it out well so that it's damp but not dripping, and then carefully dab at the stain. Work from the outer edges towards the center to prevent the stain from spreading further. After removing the stain, blot the area with a clean, damp cloth to rinse away the detergent residue and then let it air dry naturally.

For greasy or oily stains, you can sprinkle some talcum powder or cornstarch over the stain and let it sit for about 15 to 30 minutes. The powder will absorb the oil. Then, gently brush it away with a soft-bristled brush and follow the steps for spot cleaning with the mild detergent solution.

Periodically, your corduroy sofa will need a more thorough cleaning. You can choose to use a commercial upholstery cleaner that is suitable for corduroy fabrics. Before applying it all over the sofa, test it on a small, inconspicuous area, like the back or underside of a cushion, to make sure it won't cause any discoloration or damage to the fabric. If the test is successful, apply the cleaner evenly according to the product instructions. Use a soft-bristled brush to gently work the cleaner into the corduroy, following the direction of the wales. Then, use a clean, damp sponge or cloth to wipe away the cleaner and the loosened dirt. Let the sofa air dry completely, preferably in a well-ventilated area.