The mil guys who use cans don’t give a shit if they are clean. They also don’t pay for or own them so they don’t really care about them. Don’t base your choices off things people in the military do other wise you’ll end up with an itchy crotch and a couple of child support payments.
No sir thank you, don't want any of that, I am still married to the same lady for 44 years. She is always there for me though the company I worked for sent me on a lot of short overseas trips from Europe to Asia all through my 30 year career after the USAF. No, I was not in sales.
So what happens if you don't clean your can? I lost count how many rounds have been through my FA762SS since I acquired it about 15 years ago. When I used to shoot over 10K rounds a year in matches and on training, I used it a lot in training for across the course for the noise reduction, a courtesy devise, as my friends in the UK calls them. It changes the rifle balance, but no big deal. Thanks to Surefire they have brake adapters for ARs, M1as, and bolt guns, I switched the can across a few platforms.
Many days before hunting season I screw it in my hunting rifle and verify POI every other day, still good after all these years with a bunch of MexMatch M118 brown boxes for hunting. Left over from my M1A days in competition.
I even adapted it to my AIAW 300WM and dumped a bunch of rounds through it with FC Match 190s punching holes through Cayotes down the senderos.
I had access to my personal 1000 yard range down in SoTex where I did a lot of shooting and hunting.
Again, all these years no cleaning, what bad could happen now if I don't clean it?
If there is real benefit in cleaning I will do it to my 5 yo AEM5 as it is getting a lot of rounds through it now. If it just makes me feel good, forget it, I am too lazy at my young age of 68, who has been retired retired for 9 years.