I have a new fly catcher The last one got too clever and would go in the electric zapper for the dead flies. one day the zapper was left on a d it fried. or rather cooked on the wires.
this is just a small one they manage to get in the flat through the expelair kitchen fan .
problem is when they get bigger so does the crap they leave on the walls,
but I leave them alone all they do is eat unwanted flies and bugs that invade my space and will bite me the soonest possible chance. this one is quite cute beats me how they can move just as fast up the walls and on the ceiling as on the floor.