That's what I use too. The dust is good stuff.

For the ones you can see, I use soapy water. Ordinary dish soap mixed
1:15 with water from a spray bottle knocks them down and drowns them
faster than anything I've found, and they don't go into a buzzing
stinging frenzy as they die. It's safe around kids, pets, and food.
(I'd be careful around electrical of course.)

reply:

Two very useful suggestions. Thanks.

Steve