The answer to 'why is my window pet stains' is that pet stains on windows are commonly caused by pets rubbing their noses, paws, or bodies against the glass, leaving behind dirt, oil, and other residues. These stains can also be the result of pets licking or drooling on the windows. Symptoms include unsightly smudges, streaks, and discoloration on the glass.
To address pet stains on windows, you can try a DIY cleaning solution of warm water, mild dish soap, and white vinegar. Gently scrub the affected areas with a soft cloth or sponge, then rinse and dry the windows thoroughly. For stubborn stains, you may need to use a commercial window cleaner or a mixture of baking soda and water. If the stains persist or you're unable to fully remove them, it's best to call a professional window cleaning service to ensure the windows are properly cleaned and protected.