Granite countertops are beautiful centerpieces in the home. The durability of granite means you should be able to enjoy its beauty for years to come. Granite will, however, lose some of its luster and shine over time. Even if a sealant was applied when the countertop was installed, that sealant can wear thin and allow liquids to seep into the granite surface. Residue, germs, dirt and water spots can dramatically impact your granite surfaces. Regular maintenance, cleaning and sealing of granite countertops is critical to helping you protect your investment. There are many do-it-yourself products available, but these can often do more harm than good. Most contain harsh or abrasive ingredients that can damage the granite and make the finish appear dull.