Avoid using vinegar, even when diluted, to clean granite countertops since its acidic nature can diminish their shine and ruin expensive, natural stones.
Filling the reservoir of a clothing iron with white vinegar is another cleaning hack you should avoid in order to protect the material inside from corroding.
Refrain from cleaning hardwood floors with vinegar, as its acidity can seriously dull the shiny finish of the polyurethane and cause irreversible damage.