What happens next?

How to remove vomit from a car interior
Pick up any solid matter.
You can use a spatula and scrape the surface to remove chunks, or use a cloth or thick paper towel to remove pieces.
Blot the vomit to remove excess moisture.
Press on an absorbent cloth or paper towel just hard enough to absorb liquid, but not so hard that you force the vomit further into the underlying surface. Sprinkle a thick layer of baking soda over the area you're cleaning.