Granite, (St. Cecilia light) was installed in my kitchen in December. Was told that it was sealed in the workshop, and will need to be sealed again every year, which they suggested I do myself.

For daily cleaning, I've been using "409 Natural Stone Cleaner," and it does look and feel clean and shiny for the most part. However, in certain light, I see what looks like, for lack of a better description, "watermarks" here and there. I can't clean these off. Was the granite not sealed well enough, or could I be doing/using something better/differently?

What do you granite owners use to clean with? At HD recently, I saw "Simple Green Stone Cleaner" and "SG Stone Polish." Anyone used either product? Wonder if the polish would be a good idea? Also, Hope's, the makers of my fav cleaning product, "Perfect Glass," also makes "Perfect Countertops," for cleaning stone. Of course, I wonder about that too!

I'm a little concerned about experimenting with products on the granite, so before I purchase, want to check out what people here are using!

As far as sealer goes, what do y'all use? Is it difficult to apply?

Any tips or suggestions would be appreciated!