Cleaning vs. Replacing Moldy Bathroom Grout: How to Decide

https://thehealthywashroom.terracolumn.com/posts/cleaning-vs.-replacing-moldy-bathroom-grout-how-to-decide

Moldy bathroom grout is a common annoyance, but you don't always have to rip it out. If the mold is just surface-level, a good cleaning with bleach or a grout pen might do the trick. However, if the grout is crumbling, deep staining persists, or water seeps behind it, replacement is the only way to prevent further damage. Save yourself time and money by checking for moisture retention and soft spots before deciding.