Nah J you are smart as any ole coyote. Take that as a compliment, it was intended as such.
I too am not hauling away backings and stuff from my line. My awareness of potential for habituation however, makes me mix it up a bit, as far as lures go.
Depending on the backing or object holding the lure, and weather conditions, I think some smells last a very long time. Even if the lure stick is gone, I have at times in the spring, seen where coyotes have dug out the old hole.
Ideally the coyote smells your lure, investigates it, and dies. However with no trap out front that will not happen. I was playing with some smells last summer out in my yard, watching my dogs react to them. Had a couple holes in the yard where the dogs had been aggressively digging. Once in a while those dogs will still sotp at those spots, and sniff around and dig a bit.
Do they smell residual lure after all this time, or have they just come into the habit of folling aorundin that spot?
Trapper should be better educated, with all the resources they have that we did not have at the beginning of the fur boom. However this new crew that came out only because of higher fur prices often cares very little about trapping.