The $50 fix that saved me from a $5000 disaster
Found mold creeping behind my bathroom wall during a routine check. Caught it early because I actually looked instead of ignoring the small water stain. Fixed the leak, ran a dehumidifier for a week, problem solved. If I'd waited another month it would've been wall replacement, drywall rot, the whole thing. Moral: stop ignoring small water issues, they cascade fast.