Clorox toilet bowl cleaner.
A few squirts of Dawn dish liquid. Pour in some vinegar. Use a toilet brush to foam it up. Let it sit for an hour or two. Scrub with a toilet brush and flush. The suds susoend the vinegar above the water line.
A can of coke will often work.
Light stains can often be removed by a can of cola or Sprite as a scrubbing agent. But for darker, harder stains usually require more. I’ve used many products and methods, but the most dependable for me has been: a cup of vinegar in the toilet bowl, then a cup of baking soda; let the bubbly mixture sit for several hours; add water to the bowl to make sure the stain is covered. The vinegar should dissolve mineral deposits. The baking soda is the abrasive scrubbing agent. Wear long rubber gloves and a scrubbing sponge. Then put your strength to work to scrub the stain off. If you need more help, use Barkeepers Friend or Ajax and scrub more.
By the way, we have moved into several houses where we had to scrub everything. But my uncles who built and flipped many houses said the first thing they always replaced in used houses was the toilets because no one wanted to sit on a used toilet. Just different viewpoints. Jewell
Hi Gina. I'm Cindy. Begin by pouring 1 cup of vinegar into the toilet bowl. Swish the solution around with the toilet brush and leave it sit for about a minute. Then add about 1 cup of baking soda and add another 1 to 2 cups of vinegar The solution should fizz and create a bubbly concoction. Leave it sit for about 5 minutes and then scrub the toilet making sure the solution reaches all the stains in the toilet. Finally, flush the toilet and you're done.