I try to put 4 or 5 drops in mine. You can put it in several ways and it will work. Some folks put drops on top bars. Some put drops on the bottom or sides, front or rear. Some put it on cotton or a piece of paper towel in a Ziploc bag that is mostly closed. Some idiots (like me) even make their own lures out of 2" pieces of straw stuffed with cotton because they think it makes the LGO last longer.
Some folks put it on a Qtip, in or out of the baggie. I guess it really doesn't matter where you put it in the trap as long as you put it in the trap. I put it in at the beginning of the swarm season and it normally lasts all summer for me. Good luck with it. Hope you catch some bees.