Welcome to the forum
That's the good news
The bad news is Pigeon Poo is
VERY dangerous!!!!
Ocular histoplasmosis, a fungal infection that eats away at the eyeball is just one of over sixty diseases that birds can transfer to humans. Their droppings are often the vehicle for transmission as they dry out, turn to dust, become airborne, and are absorbed by the mucus membranes of unknowing victims.
Droppings are also a carrier for potentially fatal illnesses like salmonella, E.coli, respiratory histoplasmosis (which can permanently affect the lungs), Cryptococcosis, or meningitis to name a few.
Get a specialist, please don't try cleaning it yourself unless you have a face mask as a minimum!!!