Cleaning silver faceplates?

I did a search on this subject, but didnt' find anything. Around the on/off buttons on my silver equipment (mainly my Classe amps), a "brownish" residue has built up over time, most likely smudges of dirt/oil from my fingertips. Can someone recommend a cleaning solution and/or method for this? BTW, I'm asking here first before even trying something as simple as water and elbow grease. Thanks.

I use 409 and paper towel. Works great.

Windex and a soft cottom cloth.
I have this same problem on my EAD powermaster. I have used plain water and windex but they both just leave smudges. Theres like a slight haze on the plate under certain views.

I am afraid to use anything on Ead's unique face such as chemicals
I would bring 3 litres of javex to a boil, then fill your high pressure hose (min pressure of 3000 PSI)with the javex then spay the troubled area for 30 to 40 minutes.
A soft cotton cloth and Endust for electronics is what I use.

I've done that, except I presoked the face with bleech and then used and ultra high pressure (7239.434 PSI pressure) and tried that for 6 hours and 52 minutes. No prevail...not sure what to do with it now.

Maybe flush it down the toilet????
Whatever you use, spray the cloth, never the componant!