I would wax the traps at least to help prevent rust and cut down on the scent of the steel, even though you've boiled the oil off, the smell of the steel is still there, wax also helps the traps to fire quicker and smoother. I've had one set out here in Ga. for over a month. I thought about pulling it yesterday and decided to pull it today. I had been luring and baiting it up when I would check my line but had no hits.......until last night..it was clear and cold...and a coyote dug up my dirthole, missed the trap pan but the bed looked like a bomb went off.....I put in a deep dirthole and he had to really dig to get his snozz in there to get to the bait, if you are on sign and coyotes are you target animal, they will teach you patience unlike any other animal. we can trap yotes year round here in Ga.(which is what I do). but sometimes it takes up to a week even if you're on good sign for them to get the courage up to start working a set....set upwind of the trail or scat or tracks, bed the trap as solid as you can, lure it up and be patient. I can throw out a trap and catch a fox in a day or two....they don't call em wiley for nuthin'.Oh, and wear rubber boots and keep your scents and urine separate from your trapping tools.....use gloves to set the traps but change them to put the bait or lure in...go on Youtube and put in "how to set traps for coyotes" there is a ton of info and videos showing you just how to do it, I still go back and check them now and then........