Step 1. Wipe down with a soft cloth and warm water.
Step 2. For stains and/or harder to clean marks, use non-splash (linen scented) bleach with a soft cloth and warm water. Wipe down the entire area using a little bit of pressure as needed but not to the point of stripping the paint or drywall.
Step 3. If marks still remain from tomato sauce or red wine spills, for instance, buy a quarter gallon of paint to match (exactly) the shade and finish of your walls or cabinetry. Be sure to check with maintenance on a rental first. Ask to see a quart or gallon of paint used in your home or business and take a picture of the sticker on the top of the lid. Take this snapshot with you to the paint store. Paint plus primer recommended and be sure to match the finish as well, ie. gloss, semi-gloss, matte. This may vary depending on the room you are touching up in your home, for instance, gloss is typically used in the bathroom while semi-gloss is customary for living and bedroom walls. Be sure to ask and know before going to the paint store.
Step 4. Lay down paint covers such as newspaper or craft paper and masking tape as needed to protect paint from dripping or splashing onto the floor or nearby fixtures.
Step 5. After carefully matching your paint to the existing color and finish of the wall(s) you are touching up, apply paint to the walls using either a high-grade bristle brush (you do not want the bristles coming off and drying in your paint) or roller as needed for the size of the job.
Step 5. Allow to dry and repeat as necessary to cover up accidents and/or normal wear and tear.
Caring for bright white(ish) walls