I do the raisin hooked in the bait holder and then smear with peanut butter. Have had them lick off the peanut butter and not set off the trap without the hooked raisin. With the raisin under the peanut butter, they get all giddy and forget themselves and just yank on the raisin once the peanut butter is gone to get it out and WHAM. Dead mouse. Caught many with this set.
