The answer to 'window cleaning smells bad' is that a foul odor from window cleaning is usually caused by the use of harsh chemicals or improper rinsing. This can leave behind a lingering chemical smell that is unpleasant. The most common causes are using too much window cleaner solution, not properly diluting the solution, or not rinsing the windows thoroughly after cleaning.
To fix this issue, first ensure you are using the right amount of window cleaner and diluting it properly according to the product instructions. After cleaning, make sure to thoroughly rinse the windows with clean water to remove any residual cleaner. If the smell persists, you may need to use a more natural, less harsh window cleaning solution.