Nair? That stuff is horrible, I can't imagine putting it in a dog's ears... !!! Unless maybe it's the bikini line/underarm stuff for sensitive areas... even then, it's not meant to be used internally and if it got inside the dog's head that could be really bad...
I have a pair of pluckers like the vet has, Bauer hates when I pluck his ears but I shave them down first with the mini clippers and then it only takes a few minutes.