Granite can be cleaned with warm water and a few drops of mild dish detergent. Wiping the area clean with a microfiber cloth will avoid superficial scratches, though generally, granite does not easily scratch. Avoid acidic cleaners because they may damage the finish on granite flooring, counter tops, etc. Stains that sit on granite can cause discolouration the longer they are allowed to stay. However, using a mild talc powder and water can allow you to form a paste over a stain. Cover the area with plastic wrap and tape down the edges. The paste forms a moisture barrier in order to “lift” a stain. Once the stain dries, wipe with a sponge. You may have to repeat the process a improve the reults.