Let them sit outside or in the wet for a day or two to get a wee bit of rust on them
or just soak then triggers in brine
the rust makes the trap work better
set your trigger about an inch or so back from the jaws
tie the trigger to the body of the trap so it doesn’t ping oaway when it goes off
pin then down together so the trap can’t be pushed along the tunnel
theres some good tutorial later on youtube