The marble countertops, the bathroom and the kitchen often loses its luster over time.
To keep them bright must pass a damp cloth daily and dry well, so it gets away with hard water.
Avoid spilling oil or abrasives as colonies or alcohol because the marble is very porous and stains easily penetrate. If it happens, it’s best to clean it quickly with soap after a good rinse and dry.
If you have not been able to act with diligence, it is best to remove grease stains is to apply a paste made from lye and plaster, leaving it on for about 30 minutes, then just rinse thoroughly with soap.