Why clean something if it's only going to get dirty again?

 

Wipe off whatever factory crud is on a new gun before firing. If have to go to the range immediately because I can't wait I still wipe it down with a pretreated cloth with solvent and then put some lube on it. I'll clean we'll later. I also like to,take it apart to make sure everything is as it should be, never hurts to inspect.

"Note that the copper colored lubricant found on portions of the slide of brand new GLOCK pistols should not be removed, as it will help to provide long-term lubrication of the slide."

 

That said, I've always cleaned and/or lubed a new gun, to some level, prior to shooting.  I just get lazy with the cleaning them in between uses...as long as they still have lubrication I'll keep running them.

"Note that the copper colored lubricant found on portions of the slide of brand new GLOCK pistols should not be removed, as it will help to provide long-term lubrication of the slide."

 

That said, I've always cleaned and/or lubed a new gun, to some level, prior to shooting.  I just get lazy with the cleaning them in between uses...as long as they still have lubrication I'll keep running them.

 

It's going to come off when you clean regardless and I've never had any issues with Glocks over a long relationship.