[Barety]

My bike currently has come clicking noises near my bottom bracket. It clicks when pedaling, not when coasting, but when I take the chain off, and spin the cranks, the clicking goes away, so I think this means that the clicking happens under load or pressure. I've checked my chainring bolts and their all tight, my chain is well greased, and my pedals are nice and tight as well. Do you guys think that it is just a simple piece of dirt or sand that has worked its way in? I don't think my bottom bracket has ran out of grease because my bike is pretty brand new. What do you guys think it is, and how should I go about getting rid of the clicking?