Wooden furniture can last for generations only if you maintain them properly.
Use warm water and mild dish soap; just be careful not to soak it. Use an old toothbrush for tough stains. Wipe the dirt off the surface with a soft cloth or paper towels and dry off any residual moisture with it.
Apply a thin coat of good-quality wax paste. Wait for 5 minutes and buff lightly with a soft shoe brush. Wait for another 30 to 60 minutes and buff again with a little pressure. You will see the shine come back.
Keep your furniture away from direct sunlight. Exposure to direct sunlight causes fading, shrinkage and cracks.
For a quick-fix touch-up, use the appropriate colour shoe polish on scratches and chips to make them less visible.