Courtney Walsh, a professional cleaner with Homeaglow in New York City, says, “Flat painted walls (also known as matte finish ...

Before cleaning walls with flat paint, prepare the area by covering ... such as this natural wall cleaner for painted walls ...

Store-bought cleaning ... of the wall and watch as the stains easily wipe away without damaging the paint as it softens. If you're dealing with softened glue, use a putty knife or flat object ...