Use goo to clean the car Interior
Goo is actually very useful. Besides keeping your kids quiet while they play with it, you can use it to clean those hard to reach places in your car: AC vents, cupholders, tiny openings, you name it.
Just press the goo against them and try to fill as many cavities as you can. It will get all the dust and debris. Wash the goo after so it would be ready for the next cleaning or playing session.