Lived in the same house since 1989......
Not in the city,not rural/country life....but closer to rural,than suburbs, yet in 26 years, still dealing with mice.
"The ultrasonic plug-ins don't work worth a damn."
Not only can I confirm that, but embarrassed how much spent on 2.......100 bucks in the 90's..doesn't do SH*T!
They sell for 15 bucks now...
Other posters suggested cats and ferrets,had both years ago,and they live for the kill,but won't help yer situation.
Also did yer basic wood mouse traps.....killed 13 mice with them from 11pm to 4am one night,with trigger smeared with peanut butter.
But still won't help your situation........
I did finally find something that works for me....
Doesn't stop them from coming in,but removes them fast.
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http://www.d-conproducts.com/products/family-low-traffic-rooms/wedge-baits/
D-CON WEDGE BAITS!
(Just noticed I need to buy more....lol.....)
THESE have been THE MOST EFFECTIVE ANTI-MOUSE purchase I ever found.
WEDGE SHAPED cardboard box, ya just pull off the top, place where mice show up.
Must be tasty to mice,cause the box empties fast....then within a day,maybe two, no sign of mice.
Right now,no mice in my house....but next trip to ACME,gonna buy 4 more wedges,
put one under kitchen sink, 3 in reserve..
Yes ,poison,but it works.
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One other thought came to mind.
Although the D-CON WEDGE BAITS are MOVE #1, If you have an infestation, buy RAT-GLUE TRAPS TOO!
Not mouse glue traps, RAT GLUE TRAPS!....Big difference between the two.....
And see if they sell glue trap bait too,cause that bait is dry,lasts forever .
Several years ago,
One of those RAT GLUE TRAPS,with that dry bait,took out 6 mice....they climbed over the dead to get to the bait!
Hope this helps.