Under-sink cabinets tend to become storage caves. Bottles, cloths, random things stuffed in. If a small leak starts—a loose joint, a tiny crack in a pipe—you might not notice until the base is soaking and mouldy.
A quick peek every now and then, with a torch if needed, helps. Look for small water rings, swollen wood, white mineral marks, or damp patches. Even a slow drip, over weeks, can lead to rot and bad smells.
Catching it early means a simple tightening or minor repair, instead of replacing cabinets and dealing with lingering odours.
