Most car seats are made from materials that can be easily cleaned with common household cleaners. However, some car seats may have intricate designs or be made from delicate fabrics that require special care. To remove indents from car seats, start by vacuuming the seat to remove any dirt and debris. If the seat is leather, wipe it down with a damp cloth. For fabric seats, use a brush attachment on your vacuum to avoid damaging the fabric. If the indents are still visible, try using a steam cleaner on the affected area. You can also try using a hairdryer to heat up the material and help release the indentations.