How to Check for Soft Drywall Around a Tub or Toilet
https://thehealthywashroom.solsticebrief.com/posts/how-to-check-for-soft-drywall-around-a-tub-or-toilet
To check for soft drywall around a tub or toilet, press firmly against the wall near the fixture; if it gives way like wet cardboard or feels spongy, you've found water damage. Look for peeling paint, discoloration, or a musty smell too. Use a screwdriver or your finger to probe suspicious spots—if it sinks in easily, you'll need to remove and replace the damaged section before mold or rot spreads.