I don’t drink coffee, but my husband does. He takes it black with a tiny bit of sugar. When I say black I mean BLACK. He uses a heaping ¼ cup of grounds for just 1 cup! It’s no surprise that the coffee pot glass gets stained quickly. I remove the stains just by using salt and water. Don’t get stuck staring at a gross coffee pot or feel like you have to replace it because it looks bad. Follow these instructions and it will look as good as new.
For my coffee pot’s tough stains, I rinse the inside with water, then pour salt inside and turn the pot until all sides are covered with a coating of salt. I let it sit for a couple of minutes then scrub the inside of the pot and spout with my hand and the salt. The stains come right off! Then I make sure it’s rinsed well and have a sparkling and shiny new coffee pot. Be sure the pot is room temperature or it could break if you use cold water on it. Buy an extra container of salt to keep around because there are other hacks using salt and your little shaker will run out quickly.
Morton Salt Company’s website suggest using 1 cup of crushed ice, 1 tbsp of water, and 3 teaspoons of their salt. Swirl it around the glass pot then rinse. Clean your coffee pot then check out these other tips using salt to remove rust and wine, help flowers, and more: https://www.mortonsalt.com/article/cleaning-and-stain-removal-2/