coolant leak

If you see white stains or corrosion like buildup on coolant hoses or  where silicone hoses connect to the metal ones, you may have a coolant leak.

Best way to resolve this is to either replace the hose if the leak is coming directly from it, or pressure test the cooling system to see where it drips out.

A small amount of coolant can slip out over time where hoses meat, so no need to panic right away.