To remove hard water stains from windows, use a mixture of equal parts water and white vinegar or lemon juice. Apply the solution with a cloth or sponge, and scrub the stained areas. Rinse with clean water and dry with a squeegee or lint-free cloth. For stubborn stains, consider using a commercial hard water stain remover or consult a professional for best results.

Remove hard water stains with a mixture of water and vinegar or lemon juice, scrubbing and rinsing thoroughly. For stubborn stains, use commercial products or consult a professional.