How Do You Explain the Difference Between Standard and Deep Cleaning?

I’ve noticed that many clients aren’t always sure whether they need a standard cleaning or a deep cleaning.

A standard cleaning usually works well for routine upkeep—dusting, bathrooms, kitchen surfaces, vacuuming, and mopping. A deep cleaning is more helpful when there’s buildup around baseboards, doors, corners, fixtures, or kitchen grease.

Sometimes a home may look fairly clean at first, but the details tell a different story.

For other cleaning pros, what signs help you decide that a client needs a deep clean instead of a standard service? And how do you explain the difference without making it feel overwhelming?