Which option best describes the difference in cleaning and sanitizing on porous vs nonporous surfaces?

• A. Cleaning on porous surfaces may not fully sanitize; sanitizing is for nonporous surfaces; porous surfaces might require more thorough cleaning and replacement.
• B. Porous surfaces are always fully sanitized with basic cleaning.
• C. Nonporous surfaces cannot be sanitized.
• D. Both processes are identical on all surfaces.

Answer: (A)

The key idea is how porosity affects how well cleaning and sanitizing work. Cleaning removes dirt and many microbes, but on porous materials the tiny holes and crevices can trap bacteria and hold moisture, making it hard for sanitizers to reach every area. That means you may clean a porous surface without achieving full sanitization, and in some cases the surface isn’t suitable for long-term sanitizing and might need replacement. Nonporous surfaces, being smooth, allow cleaners and sanitizers to contact the entire surface more effectively, so sanitizing can be reliably achieved there. So the best description is that cleaning on porous surfaces may not fully sanitize; sanitizing is more effective on nonporous surfaces, and porous surfaces might require more thorough cleaning and possible replacement.