I have a CZ 75 that is a pain in the butt to clean. My best friend has a Beretta 92 and when ever we shoot together, we always shoot roughly the same amount of ammo (give or take a few mags; most of the shooting is friendly competition), and always the same type of ammo (federal champion 115 gr). But when we clean afterward, he always gets his bore clean far faster than I do. In fact, I don't think I've ever been able to get my bore as clean as his. We both use the same cleaning solutions, but he starts to get very clean patches quite quickly, while mine still come out dark gray or black. Anyone know why this might be? Any suggestions to clean more effectively?