To clean yellow tiles, mix equal parts of distilled white vinegar and water. Spray this mixture generously on the yellowed tiles and let it sit for a few minutes. Scrub with a sponge or rubber to reveal clean tiles. If there are stubborn stains, make a paste of vinegar and baking soda.
In general, we can use toothpaste to clean the yellow stains on ceramic tiles. First, wipe the yellowing tiles bathroom with a warm towel, then evenly apply a layer of toothpaste, wait for about half an hour, and then wipe them with a rag.