Dirt under my iPhone 5 camera lens

Recently, I found tiny specks of dirt under my back camera lens. Eventhough, it is not a problem to the camera at the moment due to the focus. I think that in the long run it will eventually appear visually visible on my pictures taken with my iPhone 5. Therefore, can anyone tell me how to fix it. Also, It seems that there is an opening somewhere that the dirt got into, so I wonder if apple will replace it cause I think that it's likely to be a defect.