While our cleaners work hard to make your home sparkle, there are limits to what we can do with set-in stains or certain textured or porous surfaces, such as fabrics, wood, shower doors, bathtubs, grout, countertops, etc. We will clean these surfaces as thoroughly as possible, but they might not appear as visually clean as other surfaces. If your home has hard water with a high mineral content, it may have created permanent mineral stains or build-up. While we will do our best, we cannot guarantee the removal of all hard water deposits. Blinds that have not been dusted in a very long time is another example where we will do our best but might be limited.