Vomit odour is one of the most difficult smells to remove from a car. The stomach acids found in vomit cause it to cling to the fibres in a car's upholstery, allowing the smell to linger for many days or even weeks. Fortunately, there are a few ways to remove the smell of vomit from a car, making the car comfortable to drive again. Completely remove the vomit from the car as soon as possible, and then scrub and neutralise the area to eliminate odours.
Put on a pair of disposable gloves and pick up the solid pieces of vomit with paper towels. Avoid spreading the vomit stain by working from the outside in. Deposit the pieces of vomit in a plastic bag, and then tie off the bag to prevent the odour from escaping.
Fill a spray bottle with club soda and spray the area thoroughly. Dab the area with a dry towel until the vomit is completely gone.
Mix the warm water, salt, white vinegar, washing powder, and rubbing alcohol together in a mixing bowl. Dip a sponge into the solution and scrub the area. Rinse the area with a wet towel to remove the detergent.
Sprinkle a thick layer of baking soda all over the area.
Roll down the windows a crack to allow the area to dry overnight. The vomit smell will not go away until the area is completely dry.
Suck the dried baking soda up with a shop vacuum.