I got a couple of questions about my new Glock 21. According to the manual, it says to leave in the copper colored grease for long-term protection. However, it seems that I am getting a build-up of carbon, etc.. along the slide rail groove. Should I remove this grease or not? Also, I was taught in the army that CLP was good enough for cleaning the whole weapon (even as barrel solvent) and lubrication. Should I stick with CLP?