Hi,

Mild weather has brought ants back to our kitchen. This has been an
on/off problem for years. I would like to annihilate them once and for all.

Have built up a nice collection of powders and liquids over the
years...never entirely effective and I'd like to open up a new "front"
in the war.

I see on Amazon ultrasonic pest repellers (search for B078KNRF15) which
claim to work against ants.

I am dubious. Anybody got experience of ultrasonics for ant/insect
repelling? Does it work?

David