Mix a solution of white vinegar and water in equal parts in a spray bottle and add a couple of tablespoons of dish soap. This is one of the best and cheapest ways to eliminate stains. Spray the solution on an area and scrub it into the carpet with a clean cloth or sponge. Leave it for at least a half hour.
Also, how can I clean my car carpet without a carpet cleaner?
Keeping this in view, how do you hand wash car carpet?
How can I deep clean my car carpet without a vacuum?
Alternatively, you can use a mixture of vinegar and baking soda for cleaning carpet at home without a vacuum cleaner. Sprinkle the baking soda on the sections of the carpet and spray enough to make it foamy and scrub gently from side to side by the use of scrub brushes.