V. Samsonov, Samara
For many years I have been using an effective method of cleaning the fabric upholstery of car seats from dust and small grains of sand. To do this, take a flap of fabric (preferably white, so that the result is better visible), moisten it and cover the seat, then with light strokes of a wooden stick knock out all the dirt. Similarly, you can clean the back of the seat - there is also plenty of dust accumulating there.
Award to the council author is Heyner's Heyner Organizer.