What is the typical contact time guidance for a surface sanitizer?

• A. Wipe and allow to air dry per the product's contact time.
• B. Let air dry without wiping.
• C. Rinse with water after wiping.
• D. Wipe with a dry cloth only.

Answer: (A)

Sanitizers work best when the surface stays wet for a specific period—the contact time specified on the product label. The typical guidance is to wipe the surface with a cloth or applicator and then let it air dry, keeping the surface visibly wet for that stated duration. This ensures the active ingredients have enough time to work against the microorganisms. Letting the surface dry without applying the sanitizer means nothing is treated, so the contact time isn’t achieved. Rinsing with water after wiping would wash away the sanitizer, ending the contact time early. Wiping with a dry cloth also removes the product before it can stay wet long enough. Always follow the label for the exact contact time.