I'd call that Option Four.
Modern Clippers have a rough-surfaced wheel between two 5-sided wheels, requiring a deliberate shove to strike the spark; this is supposed to be a safety feature. Unfortunately, the three parts aren't properly bonded together; so tend to separate, especially under the pressure of the spring. The actual rough striking surface is case-hardened steel, and I would be very surprised if this ever actually wore out -- clogging with flint particles is a more likely cause of this fault, easily remedied with a miniature wire brush.