Yogabear , although I have speedplay X2 model i believe zero model is similar. If you go to their website www.speedplay.com i believe they have a menu on maintenance etc. I know from my experience just recently that you should make sure not overtighten them or on contrary make them too loose. It says that you should turn bolts until you feel a resistance and then make another quarter of a turn. If your cleats are adjusted properly you might want to lube them with whitelightening lube if your DH didn't do that yet. Otherwise, speedplays are great pedals , they are my first clipless pedals and i love them. I would also recommend to get coffee covers for the cleats, easier to walk in them plus keeps cleats from scratching and gettign dirty. Enjoy them

Marina