Let the toilet bowl cleaner drip down the mirror with the applicator on the bottom to catch the cleaner.

Scrub with the steel wool and wipe all over the window with the applicator.

Continue to apply evenly over the window and do not let it sit on the window sill.

How To Remove Hard Water Stains From Windows - DIY Window Cleaning - Window Cleaning Hacks

Image by Kahuna Window Cleaning via YouTube

Continue to watchKahuna Window Cleaning tutorialon YouTube for full instructions and details.

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Next, take asqueegee to scrub the cleaner and water off the window.

Spray with water again and repeat the process to wash off all the cleaner.

Use Toilet Bowl Cleaner To Remove Hard Water Stains - DIY Window Hard Water Stains

Immediately rinse off the squeegee and applicator.

Throw away the steel wool.

Be careful with the toilet bowl cleaner and check that to rinse everything off effectively.

Easy Ways To Remove Hard Water Stains - Best Way To Clean Windows