What to Check First When Mold Appears on Grout and Caulk

https://thehealthywashroom.cavandoragh.org/what-to-check-first-when-mold-appears-on-grout-and-caulk

When you spot mold on grout or caulk, first figure out if it's surface-level or deep. Wipe a small section with bleach; if it disappears quickly, a good scrub may fix it. If dark spots linger or the caulk feels soft, the sealant itself is compromised and needs replacement to stop recurrence.