Bird droppings are more acidic than acid rain — and Florida's sun gives them about 48 hours to etch your glass for good

Bird droppings contain uric acid, which registers around pH 3.0 — more acidic than acid rain. On glass, that acid slowly dissolves the silica surface, creating microscopic pits and permanently dull spots. Early on there's no visible change, which is the trap: by the time a window looks etched or cloudy from droppings, the damage is already done and can't be cleaned away.

Florida's heat makes the timeline unforgiving. As droppings dry in direct sun, the water evaporates and the remaining acid concentrates directly on the glass — accelerating the reaction considerably. What might take several days to cause lasting damage in a cooler climate can become irreversible in as little as 48 hours here. Homes near oak trees, power lines, or the coast, where roosting birds are common, deal with this year-round, not just occasionally.