Yes, vinegar and baking soda can be used to remove old stains from carpets. To use this method:
1. Create a paste from equal parts vinegar and baking soda.
2. Apply the paste to the stain, and gently rub it in using a soft cloth.
3. Allow the paste to sit on the stain for about 10 minutes.
4. Blot up the paste with a clean cloth.
5. Rinse the stained area with cold water, and blot again with a dry cloth.
6. If the stain is still visible, repeat the process until it is gone.

How do you get deep old stains out of carpet?

To get deep, old stains out of carpet, you’ll need to use a combination of cleaning products, a scrub brush, and a vacuum cleaner. First, test a small, hidden area of the carpet with the cleaning products to make sure that they won’t damage the carpet. Then, mix together a cleaning solution of 1 part dishwashing liquid and 4 parts warm water. Apply the solution to the stain and use a scrub brush to work it into the carpet fibers. Allow the solution to sit on the stain for a few minutes and then use the vacuum cleaner to remove the solution and the stain. Repeat the process if necessary.

How long do you leave baking soda and vinegar on carpet?

For carpet stains, it is best to mix a solution of equal parts baking soda and white vinegar. Apply the solution to the stained area and let it sit for 15-30 minutes. After that, blot the area with a damp cloth to remove the solution. You may need to repeat this process several times to fully remove the stain.