This works! I do not use a glass cleaner afterwards, I use vinegar or ammonia for shining glass. I do not recommend ammonia (the fumes are overwelming) if you do not have lots of ventilation. Vinegar is safe. The white ashes are wonderful as a cleaning product. Further they are biodegradable and give that extra boost to soil for plants, gardens or soil around trees. Ash is also used to scrub plank wood floors in many countries. Thank you for posting. In this era and economy, many people do not realize they have products right at their fingertips to use again in any way.
This really does work. I have also found that it works on the baked on grease on the inside of my oven window.