https://www.bauhaus.ch/de/p/swissinno-supercat-wuehlmausfalle-20064536
I got something like this.
If you buy something like it, I recommend, you also buy their special tool to stamp out the hole it goes into.
It works great, I just ended up killing the wrong animal :(
edit:
It's also worth noting that some people say trapping will make them breed more. Can't really confirm, but sounds plausible...