Hey Glock.
I obviously don't use a corroded flint and part of my process is to coat them in silicone spray, allow them to dry before reassembly. As for failing, I ha ve had Glocks fail on me several times. I can understand picking up a strange one in the field and having it fail, but my own weapon? I have several Glocks simply taking up space in a safe because I don't trust my life to them. Just my opinion.