the deep fryer was as clean as a whistle and the salad was crisp .
it was no-doubt enough to convince some critics of one of the world 's biggest fast food chains that it is n't all bad , but health experts still say that no matter how hygienic the conditions of the 612 kfc outlets in australia are , the food giant hoped to dispel ` blanket perceptions ' of negativity around the quality and freshness of their ingredients .