to kill a fly

There is a fly in my house. Just one. It has been flying around in here for a day or two.

It is the non-buzzing kind, not one of those filthy obese monsters, but still, irritating.

I pride myself in being a good fly swatter.

The fly was sitting on my sink just now. Washing its hands.

I tried to catch it with a glass. I can't kill something that washes its hands.

It is probably laughing at me now, while it whizzes past my ears.