I would doubt the role of fire in germination as these plants seem to germinate on mass where there has been no fire for many years. A better method would be to sit them sown in a bone dry pot in full, hot sun for a few weeks then wet and cool them, maybe stick the pot in the fridge for a few days? I have never tried this but it should recreate their natural growing habit, remember in SE Aust the sun is VERY hot and the summers are dry (except for this one!!). Simply wetting them will not work (well) as it is quite wet here at the momment (for summer) and there are no glanduligera germinating.