In a bowl or small bucket, mix one part white vinegar with three parts water. Dip the bristles of the scrub brush into the solution and rub them into the carpet. Massage them into the fibers well (without fully saturating the carpet) and follow up with a cloth to help blot excess moisture.

Steam cleaning works best for the removal of ingrained dirt and deep stains, and doesn't leave any residue or odors in your carpeting. Especially if you have pets, this is the best method for getting smelly stains out.