Mold in tile grout usually keeps coming back because of constant moisture and limited ventilation in bathrooms. A good solution is to deep clean the grout using a mold remover or a baking soda and vinegar mix, then make sure the area is properly dried after each use. Improving airflow—like using an exhaust fan or keeping the door open—can really help prevent it from returning. If it keeps happening, resealing the grout is often the most effective long-term fix.

It’s interesting how recurring issues like this often come down to proper maintenance and setup, whether it’s home care or even digital tools. I came across this while looking into similar guides:
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