birds or pigeons make clothes line and wall dirty by dropping a lots of poops when owner of condominium is not home for long time

animal balcony bird bother building carp clothes concrete crap cryptococcosis damage defecate dirty disease dove drop droppings dung excrement feces fresh grunge home house impact interference line mess messy muck nature nobody nuisance old pigeon pigeons poo poop problem rock shit splash splat splatter stainless steel stool texture turd wall washing water