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...Why staples and glue? It seems more like an arts and crafts project than a trapping technique, plus those staples aren't particularly sharp. Hammering sharp, thin nails into the bottom of it is better. This should also leave a little bit of the nail and its head coming out of the back end, helping to anchor the trap down in the dirt. This works great for squirrels. Also, as far as "making it more humane", it doesn't change anything. Rats and mice are killed by the bar snapping their spines, not suffocation. The trap, when used as it is intended to, is perfectly humane when set correctly.