Also, they’re sensitive to moving shadows. As with motion sensors, if you move slowly enough, they cannot sense you. Slowly circle behind them and they jump into your death mitts.
Anyway, this has worked out better for me than a Bic lighter and hair spray. But that works too.
Can confirm this works. I used to astound all of the waitresses when I was a dishwasher because I could swat a fly every time without fail.