Ever use carb cleaner on your nipples?

I do it all the time to clean the nipples. but clean mine every time I shoot it.

Agreed, I clear the barrel and nipple every time it is discharged too but prolly not more than enough to keep the gun operating properly. If I am hunting for several days, I'll leave the same load in and keep the gun outside. After a few days, i'll discharge it and clean up a little better. But at the end of the season I take it all apart to wash down and re-oil everything.