I've had good luck the last 15 years using 2 ultrasound rodent repellers that I bought from a mail order catalogue (don't remember now which one but they are probably still available). They also have a little red test button to give an audible sound that assures they are working. The two units in my garage plug into wall outlets and emit a high frequency sound cone almost 180° wide that are above the human range and are supposed to also keep some insects away in addition to various vermin like mice and squirrels. Works for me - no mice, moths or squirrels!! And no mess or smells! Brian D500s in MI
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