i didn't read all the posts. but did see mention of bucket trap... *big thumbs up*
one 5 gallon bucket, a rod (wood, metal, even some wire say 12 awg (size of a normal single wire ran in homes)), and a can or jar (i used a old peanut better plastic jar). and a couple pieces of short lumber used as ramps.
drill 2 holes in top of bucket, drill a hole in bottom and lid of (plastic jar) in my case, run rod or wire through holes of bucket and jar/lid, so jar/lid is near top or slightly sticking up out of the bucket. make sure jar easily spins on the rod or wire.
fill bucket with say 3 to 4 inches of water.
rub some peanut better on the jar, (make sure you spin the jar, it needs to spin freely after you put the peanut better on it), if jar wants to roll down to one side, smear the peanut better out to adjust the weight, so it spins freely and easily. ya don't need to lather the peanut better on thick, just paper thin if that of a coating. ((much easier to clean jar off if need be once ya catch the mice, or to redo peanut better later on))
put bucket, with water in it, and jar with peanut better on it, were ever, and put a couple boards running from floor up to side of bucket, for ramps.
mice will climb up ramp, get on the jar, and jar will spin, dumping the mice into the water, were they drown. the water also prevents the mice from jumping out until they drown. check daily, and remove mice as needed (dump water out as well when you find dead mice).
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above works awesome, nice easy way to catch lots of mice, make it 1 or a dozen in a single trap, and no fingers get pinched, no need for gloves or like to deal with dead mice from regular spring traps, no dead mice dieing in some un obtainable area and stinking up the home form poisons being used. safe for regular animals (cats/dogs) well atleast as long as they don't go diving for the trapped mice. no stinking glue traps, and moving furniture trying to get at a mouse that is stuck on one and dragged itself under something.
((have used baby gates / dog gates)) around the 5 gallon bucket traps in the home, to keep the pups at bay. they love there peanut better and more likely clean the bait off the trap :/
the 5 gallon bucket traps ya look ugly in the home, but man are the easy to deal with.
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btw do not dump mice down toilet, they might come back out of the toilet if there not dead, or up and out of another drain in your house. it sounds like torture but just give them a couple hours they will drown and die in the bucket 3 to 4 inches of water in it.
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youtube has some good videos of 5 gallon mouse traps. with parents/kids doing, pretty easy to make and use.