I received a small packet of blessed uncooked colored rice when I ordered some items from Rudra Centre. A little paper said to put it in a small bowl and put it on the altar near the yantra I ordered. Am I supposed to keep the rice forever or do something else with it? Inevitably ashes from incense or common household dust will fall on it; what to do then? I know you can't blow on it to blow off any foreign matter.