I actually think it wasn't blowing on them that did it, but the act of blowing on them and then inserting the cartridge more deliberately the next time. And ea

I actually think it wasn't blowing on them that did it, but the act of blowing on them and then inserting the cartridge more deliberately the next time. And each time after that, being more deliberate. It was the act of putting it in 'just right' that did it, not blowing at all.