If your radio speaker grills are looking a little dirty, there are a few ways you can clean them. For light cleaning, you can use a damp cloth to wipe down the grills. If they are more heavily soiled, you can use a mild soap and water solution. Be sure to rinse the grills well afterwards to remove any soap residue. You can also use a vacuum with the soft brush attachment to gently remove any dust or dirt build-up.