Bees in a chimney in camarillo

Another issue of bees in a chimney.
When I arrived they had left already, but a few were still around in the house.
The owner had used killing spray to defend herself.
I left because there wasn't much I could do.
When she called again a few hours later, about 20 or so were in the fireplace behind the glass windows.
The owner thought these were a lot of bees :-)
I started my smoker, put it in the fireplace and the bees left.
I vacuumed up all the bees that were still in the house, dead or alive, and placed a piece of hardware cloth on top of the chimney to prevent them from ever scouting things out again:

Small detail: I am afraid of heights ;-)