Pollinating Pinguicula flowers; once you figure out where the stamen are hiding and which surface is the stigma, the act of pollination is straightforward and simple. However, accomplishing pollination does not always result in fertilization, and sometimes even what may appear to be ripe and fertile seed may defy all attempts at germination - such seed may even appear normal but have no viable embryo.
Once I developed a population of about forty Pinguicula 'Sethos' plants in order to have many flowers of the same clone which I could then use to attempt seed production by self-fertilization in attempts to create a population of F2 generation plants. For most of the year there were many flowers being produced during my efforts at this. During a period of several years I 'pollinated' several hundred flowers, some produced seed pods, some seed pods contained no seed, some contained seed that looked normal but were empty inside, some produced seed that appeared normal in every way, but that simply wouldn't germinate, then finally one seed pod produced seed which all germinated quickly and grew with great vigor. I grew about forty of these to maturity and selected one that produced green leaves that stayed green no matter the growing conditions, it's flower was also a very bright shade of red that appears irridescent. So, for me, the wait and the effort were worth it.