The answer to 'tile smells bad' is that there are a few common causes for this issue, including mold, mildew, or bacteria buildup in the grout or cracks in the tile. Symptoms may include a musty, unpleasant odor coming from the tile. To address this, you can try cleaning the tile and grout thoroughly with a mixture of warm water and vinegar or a commercial tile cleaner. Make sure to scrub the grout lines and let the solution sit for a few minutes before rinsing. If the smell persists, you may need to regrout or even replace the tile if there is significant damage.
If the tile smell is very strong or you're unable to fully eliminate it through DIY cleaning, it's best to call in a professional tile and grout cleaning service. They have specialized equipment and cleaning solutions to deep clean and sanitize the tile, as well as identify and address any underlying issues that may be causing the odor.