Water stains can me a homemaker's worst nightmare. They leave a residual film of soap and grime that can take many hours of scrubbing to break down. Hard water typically refers to a stronger concentration of minerals within the water, thus rendering it less soluble. Without removing the hard water stains, your tile will quickly become dull and will eventually need to be replaced.
Mix together 1/2 cup water, 1/2 cup lemon juice, 1/4 cup vinegar and 1/2 tsp. detergent in the spray bottle. Shake gently to mix the ingredients entirely without creating an overwhelming amount of suds.
Spray the mixture on the tile in heavy amounts. Allow the blend to sit for 30 seconds to eat away at the hard water film. Spray an additional amount of the mixture on the tile to wet down the area for scrubbing.
Scrub the tile in a circular motion with the brush. Scrub in the grout, over any curves and along the edges while working the mixture into a lather. Brush across the entire surface of each individual tile.
Rinse the tiles immediately with hot water to avoid leaving streaks. Spray with the strongest setting of the shower head if cleaning shower tiles. The force will help lift away remaining stains and grime. Allow the tile to air dry.
Repeat the treatment with an additional 1/2 cup of lemon juice for resistant hard water stains. The acid in the juice will break down the minerals with more intensity than the previous blend.