SCENTED | GRANULES - PURPLESCENTED GRANULES PURPLE _ Simmering Granules are normally used in oil burners, but are less messy as they dont need oil or water. Just put a spoonful of granules on the burner and replace them when theyre used up. Usually, 1 teaspoon will give you up to 4 6 hours of fragrance. Chase away cigarette odour by placing a few granules in ashtrays; freshen bathrooms and cupboards with a little bowl of granules, use them like potpourri, add to organza bags