I love this curling iron, however, it is about my fifth one as the spring on the clamp tends to loosen with use.  When the clamp is not tight smaller amounts of hair are not held effectively and they just fall off of the barrel.  Hot Tools supplies an extra spring to install when this happens, but then the replacement spring loosens.  Consequently, I just purchase another as I've never found another brand of curling iron that works as well for me (when the clamp is tight).