About 30 years ago we had a mouse problem in the apartment we then lived in. It seemed to be infested with mice. I was setting traps (the old-fashioned ones that kill the mouse when it starts to eat the bait) with cheese - the commonest mouse bait. Well, our mice were experienced mice!! They were able to get the cheese off the trap without getting caught! I set these traps each night and each morning, there they were - no cheese remaining, no mouse caught!
I thought that, clearly, I needed a bait that would be more difficult for them to get free from the trap. After a while, I decided to use curried beef. Why? No idea!! It just came to me to try that - the beef would be more solid than cheese, the curry flavor would attract them. So, that night I set three traps and placed one in the living room; one in our bedroom; and one in the kitchen.
Some time in the middle of the night I woke up when I heard the trap in the bedroom snap - “Aha!” I thought, “gotcha!” and went back to sleep. However, a short time later I was re-awakened by a strange noise. Listening for a little bit (I didn’t put on a light, as my husband was sleeping soundly through all of this), I thought that the trap had been flipped over when it caught the mouse and that another one was trying to get at the bait. I just went back to sleep.
In the morning I found that, actually, two mice had been caught in the bedroom trap at the same time. It had flipped over. One of them had not been killed outright when it had snapped and the noise I had heard was the second one trying to extricate itself from the trap. It failed and, by morning, it too was dead.
I took the trap and headed into the kitchen to empty the two corpses into the garbage bin, only to fine that the trap in the kitchen had worked well, also - there was one mouse caught in the trap and a second one lying dead inches away from the trap - that one must have got a blow as it approached the trap that killed it without catching it!
So, I emptied both traps and headed to the living room - to find two more mice caught in the third trap!!
I had no more trouble with mice for a long time after that and always used curried beef as bait whenever I did need to eliminate a mouse problem. Make sure that you remove some pieces of beef from your cooking pot before the meat begins to get really soft from the cooking - you need it to still a bit tough / chewy.
Of course, I live in Trinidad, where curry is almost a staple food. Our mice probably have a taste for it!! But, it’s worth trying anywhere as it seems to be quite irresistible.