Why should bird droppings not be allowed to accumulate?

Of the pigeons or other birds have taken up residence above your windows, your balcony or your terrace? As a result, your windowsills and patio are covered in bird droppings… Don’t wait to clean them.
Can pigeon droppings damage my home?
The answer is yes. Pigeon droppings are acidic and corrosive. If they remain on your roof, gutter, window sill or balcony for too long, they will seriously damage materials and certain construction elements such as chimney ducts, as well as leave stains. So don’t let them accumulate for months!