Tried 5 other brands and these are the only traps we had success with. Try peanut butter with a piece of milk chocolate stuck in it as bait.Chocolate on it's own doesn't seem to trigger the trap as I guess they can remove it too easily. Buy in bulk though, no point re-using after a kill (sounds harsh but after a while you become de-sensitized!)as they seem to avoid them because of the smell.
We've killed 6 so far in a week using these traps, even 2 in one trap last night! It does feel wrong, and I wish there was another way but when you're being terrorized by these dirty little blighters and humane traps don't work, what can you do?