The water will become cloudy as starch from the rice mixes with it. Strain the liquid into a clean glass and allow it to reach a comfortable temperature. Do not use very hot liquid in your mouth.
Take a small amount of the rice water and gently move it around your mouth for approximately 20 to 30 seconds. Spit it out rather than swallowing it. Follow with a rinse of plain water.
If you prepare rice water specifically for oral use, make a fresh batch rather than keeping it at room temperature for extended periods. Fresh preparation reduces the risk of bacterial growth.
It is also important not to scrub your teeth with dry rice, rice powder, salt, baking soda, lemon juice, or other abrasive ingredients. Excessive abrasion can wear away enamel and make teeth appear more yellow because the naturally yellow dentin underneath becomes more visible.
For genuinely healthier-looking teeth, the most important habit remains regular brushing with fluoride toothpaste. Brush gently twice a day for approximately two minutes using a soft-bristled toothbrush. Pay attention to the gumline without pressing excessively hard.