Not only car speakers, but speakers in general. What do you use
To clean the mesh? Dirt accumulates in the small holes.

Not only car speakers, but speakers in general. what do you use
to clean the mesh? dirt accumulates in the small holes.
Shop vac with brush attachment and a light touch.

If grill is removable, I rinse with water or use air compressor to blow it out depending on whether it is fabric or metal.