Windows and Whacko Neighbors

So I'm washing away vigorously on my kitchen window, with paper towel and window cleaner. When the college-age young lady who lives across the street walks out of her place. She waves at me, seeing me in my kitchen at the window. So I wave at her with my other hand.

I met her only briefly (and think I remember her name, but without enough certainty to use it) because she was locked out of her home one night and knocked to ask me if she could use my phone to call for her roommate wherever she was to come let her in. I was actually amused that I suggested she try her Facebook account when she couldn't find anyone. It hadn't occurred to her. Score one for Gen. X! She eventually succeeded. We've basically smiled and waved since then when we cross paths in the parking lot or in the courtyard.

So my question is, did she notice that I was cleaning my window or think I was waving like a maniac from my window? And worse if the latter, did she think I was lurking there waiting for her to walk by?

I of course can't ask her either of those questions because if she knew perfectly well I was washing my window, the mere fact that I raised the nutcase scenario might leave her to believe I'm a nutcase.

Great. I'm the weird old guy next door. She'll probably buy a pepper spray canister now.

My only saving grace is that she's seen me with my kids and they look perfectly happy and healthy. So how bad could a dad be?

Oh, and to add insult to injury, after washing all my first floor windows inside and out, I discover that a good deal of the dirt appears to be inside the inner and outer panes and thus immune to my vigorous scrubbing.