the first lot of spring traps we bought were shit. it took mega agitation to set them off. Then we bought old-style 'little nipper' ones. If a mouse even twitches a whisker near those it's goodnight vienna.
We used to use those when I was a kid. - when my Dad's mystical "Be gone mice" incantation didn't work. Which was most of the time.
Though I always found their name "Little Nipper" darkly amusing. But then I suppose it does sound better than "Die you furry little bastards"