I try to clean my guns as soon as possible after I shoot them. I think it's easier to clean the residue off when it's still "fresh". but as others said, with newpro ammo, it's not a huge issue. toughest clean up I ever ran into was trying to get all the black off the end of the cylinder on my S&W 66 stainless after I had forgot to clean it and it sat dirty in my safe for a few weeks. I dont' shoot much corrosive, but when I do I get all psycho-anal about dowsing the gun down ASAP.