ENGL Invader - Shiny Face? What do you use to clean these?

[WizardSouth-JP]

lots of smudges on the mirror faceplates on the ENGL 150, what do you all use to clean these things so they don't look so mucked up?

 

[jc986]

I used just a bit of windex when I had a Powerball v1 with the same type of mirror faceplate. Major pain in the ass