I think you don't need to remove the entire panel for just cleaning the switch. I thing you should get the plastic that holds the swith out the panel without removing the panel itself.
Into this same site it is described the way to get the switch holder out. If you have an ash tray, pry it out and remove the screw under it. Then consider the plastic holding the switch as havind two parts: Ash tray and switch. Pry up the ash tray side of that plastic and dettach the switch harness.
I hope have helped you.
