We have ceramic shower tiles that I have tried a half dozen different cleaners on but still have not found a way to clean the mold on the grout in between them. I’ve tried the vinegar, dawn, peroxide mix, an essential oil plant-based cleaner, Krud Kutter, etc. and still nothing seems to work effectively. We live in a rental property so this makes me even more anxious because I want to keep it clean! Any other suggestions are welcome.