if it is outside, you can clean it yourself, but do not know how good you are, will you scratch your lens instead of cleaning it? It is alwasy better to leave it to someone who are experience and skillful. you can contact our
Part-time Repairman Part 2, fatigue, he will able to help you will a small fee, if he is not too busy.
you can bring it back to Nikon Service Center, they will able to help you too.
fungus cleaning is not free and can be very costly, that is a very good reason we always recommend to get a dry box or dry cabinet from day one you have a new camera.
hope this help.