Is it normal for car film to shed powder when wiped after aging?

[LaZoey]

It is normal for car film to shed powder when wiped after aging. Car window film is a thin layer applied to the front and rear windshields, side windows, and sunroof of a vehicle. This thin layer is also known as solar film or explosion-proof heat-insulating film. The functions of car window film include: blocking solar heat and glare; reducing the load on the car's air conditioning system, improving fuel efficiency, and enhancing driving comfort; blocking ultraviolet rays to protect the skin of occupants from UV burns and slow down the fading, aging, and cracking of interior materials; increasing driving safety by keeping glass fragments in place to prevent injuries; and creating a private space to prevent others from peering in. Methods to remove aged and powdery car film: Set a hair dryer to the hot setting and blow it on the edges of the film while peeling it off to soften the adhesive; any remaining adhesive residue on the glass can be coated with sewing machine oil and wiped off after a few hours to ensure no stains are left on the glass.