Here's the trick:

Wear your mones on your wrist or palm of hand.

When you greet your mark, you say, "Oh, you've got an eyelash on you..." then, under the pretext of cupping her head with your hand as your thumb gently brushes off an eyelash (which isn't there), your palm or wrist is now just 2 or 3 inches from her nose.

You could even add, "Close your mouth please...don't want to swallow an eyelash."

That way, she's forced to breath through her nose. Now there can be no doubt she has smelled your mones.

A variation: You say, "What's that fuzzy in your hair?" No, you missed it. Here, let me. Oh, it just fell onto your forehead! Stubborn little fuzzy." If the tips of your fingers are at her bangs, then your wrist, the point of application, is 2 inches from her nose.

P.S. I came up with this because I shoved my neck in a co-worker's face today and said, "Smell my neck." She turned her head and backed away. I don't think she inhaled. The above trick is more subtle.