If you accidentally mix wax and oil, the finish will turn cloudy. In that case, wipe the finish off and clean it with mineral spirits or a solvent-based wax remover. Wax or polish when the finish is dry. If the brass hardware on your furniture has a protective lacquer coating, it probably will not tarnish and will only need to be dusted. If the brass is tarnishing and you want to polish it, either remove the brass or slide a piece of mylar plastic behind the hardware so that the brass cleaner does not touch the finish.
Wood is very sensitive to changes in relative humidity.
As the weather changes, so does the relative humidity in your home and in the moisture content of the wood in your furniture. This means that furniture is constantly expanding and contracting. Wood does best in moderate conditions of around 70 to 72 degrees Fahrenheit and a relative humidity of about 50 percent to 55 percent. That means using a humidifier in winter and an air conditioner in summer. Furniture ages more quickly if stored in a basement, attic, garage or warehouse.