using a tent peg to find and then check you’ve got a good clear run & stick with the spring loaded traps (bucket over top to keep light out)and checking regularly, most effective in my experience. Many years ago we used to use gas tablets, based on phosgene I think, not now for various reasons.
I read about an eccentric Victorian who ate anything, he said a mole was the most disgusting thing he had ever tasted, closely followed by a bluebottle.