Review on 🍋 Spicy World 2 lb Pure Citric Acid: Food Grade & Non-GMO, Natural Preservative for Food & Beauty by Jessica Rogers

I used it to clean my 4 liter instantaneous water heater and instantaneous water heater. I forgot to take a "before" photo but it was filled to the top of the wall with 2-3mm of debris. I put 4 tablespoons in the kettle and cooked at 208F. I forgot about it for over an hour. I was surprised to see that the wall was clean and shiny. Removed all water and sprayed vigorously with water to rinse. I didn't delete it. Filter and wall are clean. After a single boil, only very small deposits remained. This is a good product.