Set-in stains can ruin the look of a carpet. When cleaning a carpet, take care to make sure that the method employed doesn't damage the carpet. While a scrub brush isn't normally used to clean a carpet, there are occasions when this is a useful tool. The correct combination of a scrub brush, cleaning agent and method can be just the ticket to cleaning carpet stains.
Things You'll Need
Vacuum the carpet thoroughly to pick up any loose dirt or debris.
Mix a solution of dishwashing soap and water in a bucket. Mix at the proportion of 1/4 cup dishwashing soap to 1/2 gallon of water. You can substitute a carpet shampoo detergent if you wish -- mix according to the directions on the carpet shampoo container.
Dip your soft-bristled brush into the solution and shake out any excess water. Scrub a small area of carpet with the brush and vacuum up any excess water with a shop vacuum. Don't over-saturate the carpet with water.
Move on to the next small section of carpet, scrubbing and then removing excess moisture until you've completed the carpet cleaning.