If mold is present spray with bleach diluted with water in a spray bottle and let set in. You can then take a old toothbrush or scrub brush and scrub down the tiles and grout lines. Once cleaned and dry I spray and wipe furniture polish on the tiles which will repel water after showering. I always squeegee excess water off tiles after each and every shower to prevent mold in the shower area. It leaves the tile fresh and clean and a nice sheen.
Yes Maria it does work. Water and oil don't mix so it works as a natural repellant. It leaves a nice sheen on the tiles as well. Just make sure not to get any furniture polish on floor of tub so no slips/ falls or accidents occur. Happy Cleaning!