use their instinct against them!

what i do is get some ally foil and some golden syrup. use a knife to spread the syrup on the foil and leave it outside (weigh it down with a brick if its really windy)come back a few hours later and you will find 100's of then stuck to it then just bin it make another.

none come in your house cos they all go for the easy syrup outside, but its like glue and they cant escape...