Steve G. wrote:
I am house sitting this year and the house (and walls outside)
have been invaded by ants. They form lines and march all day
and night. I did buy some cans of Raid Roach & Ant Spray and
Ant Spray but after it dries, they return almost immediately!

Is there a frugal (home-maid) solution someone could suggest?
The Raid is expensive and does no good anyway. I was thinking
about ammonia but not sure if it is dangerous.

Thanks.

Steve

I use WD-40 when I can find the hole that they go into. I wouldn't
spray it all over a room, but in a hole, behind wood, it is very
effective. It seems rather permanent.