Sometimes the cod will hit on the drop and when you go to lift up on the rod you will feel the fish. I pretty much just reel in, in a situation like this. Other times they will hit on the up swing and what I do is wait a second before lowering my tip and wait for a bounce or two then lower my rod reeling the slack and give a small quick jerk nothing to hard but enough to stick it. I haven't been fortunate to hook into a big one on a jig yet but I have heard they will just lay on it and it may feel like bottom and before you go to try to work the jig just wait to see if the bottom comes to life, if it does bring the fish in. Some times the fish will chase the jig while you are retrieving it. When this happens don't stop to set the hook but keep reeling and slowly increase your reeling speed. Hope this helps some.