Clean the furniture regularly to keep everyday dirt and grime from setting in. Vacuum the couch weekly to remove any accumulated dirt. Brush the furniture with a lint brush if you have pets that shed hair. Wash wooden or plastic furniture using a damp towel, then pat it dry.
Blot any simple stains immediately with a towel dampened with clean, cold water. For wine and coffee stains, apply a paste made from baking soda and water. For grease and oil stains, use a cornstarch poultice. Leave the cleaner in place for 15 minutes, then wipe the area with a towel dampened with clean, cold water.
Mix 1/2 cup of mild powdered laundry detergent with 1/4 cup of water in a bowl. Whisk the mixture until it forms a foamy paste. Clean the furniture with the paste in 2-foot sections, dabbing the paste on with a damp rag, then wiping it off with a second damp rag. Allow the furniture to dry completely before sitting on it or vacuuming it.
Clean the furniture deeply every four to six months. Apply a chemical cleaning agent made specifically for the material of the furniture, following the directions on the label. Alternatively, you can use a steam cleaner to lift any embedded dirt out of the furniture.