you want to clean your injector every time that you shoot a mold if you're having problems with the baits sticking you can spray Pam on them lightly just make sure that all your tools and objectors are clean before you reshoot make sure that your molds are cleaned also if you're wanting to clean your injector inside spray some Pam inside of it and run the plunger back and forth. I occasionally do this to start out with one smiling injector is hot I don't worry about it but just make sure that the plastic that is left after you shoot is pulled out of the injector.