Vacuum the couch cushions thoroughly to remove any loose dirt, dust and other debris.
Fill a spray bottle with water, and add a few drops of dish soap to the bottle. Spray the couch cushions, in small sections at a time, and wipe them down with a cloth to clean them. Alternatively, mix ¼ a cup of laundry detergent with 1 cup of warm water, using a blender. Continue mixing until the mixture turns into a stiff foam. Wipe this foam over your couch cushions with a cloth. Remove the foam using a clean, damp cloth. Repeat these steps as needed, until the couch cushions are clean.
Allow the couch cushions to dry when you are finished cleaning.