You're buying from the wrong dealer then.

This is one of those questions that when asked gets a different answer from everyone who responds , I'd hang the wire outdoors and let the weather do it's thing to it , our higher summer time temps will remove the oil / grease from the wire .

For coyotes it's not as big of a deal they can still get caught when using the wire you mentioned I've done it quite often , as for wolves I don't have first hand knowledge other than feed back from friends , some preset snares out before season and close the loop down and toss it back in the brush until it's needed along a established travel way .

There's another suggestion treat some wire and don't another coil and use both and keep records of which works better for you , I feel that you maybe surprised by the results .

I have never been blessed to be able to snare wolves (none here), but I think you are overthinking it for coyotes. Boil 1x19 snares/wire supports in baking soda or hang outside for a month or so. They will grey/dull up, which is more than sufficient for treatment.

Put your equipment out and let it work for you. Think about this: Wild animals come across thousands of odors a day in their travel routes. I wouldn't overthink it unless you get direct refusals that you can confirm with either tracks or video evidence.