To remove hard water spots from windows, start by creating a mixture of equal parts water and white vinegar. Apply this solution to the affected areas with a sponge or cloth, allowing it to sit for a few minutes. Scrub the spots gently, then rinse with clean water and wipe dry with a lint-free cloth. For stubborn spots, a commercial hard water stain remover can be used.

Hard water spots are removed by applying a vinegar solution, scrubbing gently, and rinsing. For tough stains, a commercial remover may be necessary. Regular cleaning can prevent buildup.