Urk! I'm glad you didn't go the poison route. I'm actually not opposed to sticky traps when all else fails, but IMO you have to be conscientious about checking them at least once every day and humanely dispatching the pests. They're designed to trap an animal so it dies of thirst, and that's just a bad way to go. I found some a few years ago that incorporated an anesthetic agent into the glue, so the still-living animal was knocked out, rather than endlessly struggling.
Peanut butter does make a good bait since it doesn't easily lift away from the bait pedal. Another good one to try is to touch a flame (match, lighter) to the bottom of a chocolate chip, melting it slightly, then sticking it onto the bait pedal. Sometimes I put on a dab of peanut butter and top it with a chocolate chip... yeah, I'm evil like that.
I like the reusable snap traps that open like a big clothespin. I've found they are most effective if I line up 2 or 3, preferably against a wall, with about an inch between them. I have had a trap vanish entirely at times, which really makes you wonder... If that happens, tether the next one to something with a twist-tie.
