Glock says in their manuals to clean a new Glock before shooting it. So why is this still debated so much? About the most common one I read is to fire it 250 rounds first, and then clean it. Frankly, from all the videos I've seen where people intentionally abuse and torture Glocks, it probably makes little or no difference what you do. On the other hand, I just don't see why someone would intentionally abuse something that cost $500-600, and that also might be something they need to depend on to save a life.