Hello.

I always trap my minnows and crayfish without problems, but it's always fun to try something else. For the oil, I use like you said a piece of cloth soaked in the oil, next time I will make a very little hole in the can and put it in the trap, also I will try your idea.

I just checked my trap with garlic after 2 hours the trap is full of minnows, if the garlic does not attract them, it does not scare them away.

I can't wait to see tomorrow morning if Garlic and oil attracts Crayfish.
A+