LSA, while somewhat off topic and not pertaining to .22 pistols, I do have an interesting observation about cleaners and poly frames that your post jogged loose in my foggy memory.
Way back when, in the early 1990's, I had just started as a part timer with the PD I work for. The Chief was rabidly anti-gun and the only thing he hated worse than guns was cleaning them after qualifications. He was so rabidly anti-gun that he actually told me that, if he had his way, we wouldn't be carrying firearms and would be like the police in Great Britain, no guns at all. Since he hated guns so badly, he came up with the bright idea of using brake cleaner to clean guns. Simply lock open the action, spray it out, spray in some lube and done in about 5 minutes. All well and good for him and a couple of his buddies- they carried Dept issued 3rd Gen S&W autos, full sized, all stainless steel 5906s.
Quite a few of the guys were carrying personally owned Glock 17s. One of these decided that, if the Chief could use the brake cleaner on his gun, then he could too. He came to qualifications one day, locked the slide open on his G17 (which he notably hadn't cleaned since qualifications about 6 months earlier), sprayed it out, sprayed some WD40 in it and proceeded to shoot. Qualifications in those days were VERY fast paced, with a fairly high round count. I was shooting beside him and, as the stages progressed, he kept complaining (to me, not to anyone official) that something was wrong with his gun, that the trigger was getting harder and harder to pull. Before long, notably after a long break, the trigger wouldn't pull at all. Our armorer was able to lock open the slide and take out the firing pin assembly (because you couldn't pull the trigger to drop the firing pin to field strip it) and, lo and behold, the trigger was melted to the frame. After doing some checking, it was discovered that the brake cleaner must have softened the polymer enough that, when constantly shooting, it was gummy but couldn't melt together because of the movement. When we took our extended break, the poly trigger and frame finally melted themselves together to the point that the trigger wouldn't budge when pulled. The gun went back to Glock and was repaired (I was only a lowly part timer then, so I don't know if Glock simply punched out the old trigger and touched up the frame or if they replaced the frame) and the Officer carried it up till the time he retired in 2014 or 2015. Needless to say, brake cleaner was specifically NOT approved for gun cleaning after that.
Honestly, with the prevalence of poly framed guns nowadays, I think that most, if not all, dedicated gun cleaners are poly safe. However, it is a cautionary tale about using non-gun products on guns. Not all may be poly safe, which isn't something you usually have to worry about with old school metal guns. Sure, harsh cleaners may remove finishes, but it is kinda hard for something in a can to damage the actual steel. I have read accounts about cleaners like Simple Green damaging aluminum frames, but not steel. Just thought it was an interesting tale about poly frames.
Bub75