Given that most sunscreens are waterproof and water-resistant. There are ways to remove sunscreen from the car interior.
Vinegar is versatile as it can remove everything from grease to rust and oil stains.
Leave your car doors open. Vinegar has a pungent smell. You, therefore, need to employ ventilation to help eliminate vinegar odors while working.
Make an abrasive paste by combining the baking soda and vinegar. The ratio for mixing the vinegar with baking soda should be ½.
Scrub the sunscreen stains off your car interior using a clean cloth or sponge soaked in the abrasive paste you made in step two.
Rinse with some clean water and let it dry. If the stains remain intact, you might need to repeat the process.
Alcohol-based cleaners are great for removing many types of stains, including those left by sunblock and greasy residues.