I usually use Wahl clippers, and I recently noticed that the springs have started to stretch on one of them. I tried to replace the springs and it’s more difficult than it looks, so I’ve been using my older pairs. Digging through my supplies, I realized that one of tne of the other pairs I own never worked properly. Thankfully, I talked to the lady at Wahl, she said that they would take back the guard combs that don’t work properly. So I can send them back to my supplier who will send them on to the Wahl, and they will credit me. Problem solved! It’s another reason to use a name brand, I suppose.