I'm glad to stumble upon this thread! Thank you Mr. Contractor for the valuable insight. Need your advice on granite care. My 4 years old granite flooring and countertop is now of uneven tone because some area used to be covered by carpet and furniture. I've tried some cleaning with detergents but no result. Could you recommend some products which I can DIY? And, how much would it cost to get cleaning service to make the granite looks new again?