Have you tried filing them instead? Not sure if it would get the same reaction from, but I've always found it a lot easier with my DS. You're not worried about accidently cutting them which I think automatically reduces the stress of the situation (for both of you) and it's easier to start and stop, so it's not quite as much of a battle iykiwm? I usually sit DS on my knee and turn the TV on, then I'll try and get a run at a couple and then give him a break for a minute before I try again. Most of the time it takes a couple of sittings to get through them all, but neither of us end up getting too upset and the job gets done (eventually)... HTH