I like Granite Gold, but I only use it once a few weeks. Daily I only use a sponge with water.

Many alternatives exist for cleaning granite. If the stone is sealed, the wrong cleaner can break down the sealer. Not all stone surfaces require sealing - as mentioned in this article. However if your stone is sealed, using the wrong cleaner can undo the benefits of sealer.

So if you choose to use a cleaning agent on your sealed stone, be sure it is formulated for use on natural stone.

We find that a routine using the right cleaner daily, a periodic polishing like classysass mentioned and a sealant applied every fews years (if recommended by the installer) is the best way to keep natural stone looking its best.