How are you cleaning your guns? My FN FNX-45 tends to get quite dirty after a fair amount of rounds are sent down range, especially when firing suppressed. Due to the intricacies of the lower, it is difficult to actually clean the lower. Over the past couple years in which I have owned this wonderful firearm, I've mainly been attempting to clean it out with cue tips, but still can't get all of it out. I know firearms are built to get dirty and still last a long time but my personal preference is to clean them on a regular basis if they have been used. I imagine an ultrasonic cleaner would do the trick, but I have not invested in one of those yet and I don't really want to just start blasting gun cleaner sprays all the time until it looks good either.