This is what happened when I asked ChatGPT 4...
ME
Give me hints without outright telling me the answer to the riddle: "What is always hungry, needs to be fed, and makes your hands red?"
ChatGPT 4
Hint 1: This object can be found in many homes, usually in a specific room.
Hint 2: It is not a living creature, but it does "consume" things.
Hint 3: The part about hands turning red relates to a common physical response to a certain temperature.
Hint 4: It's a crucial tool for a common household task.
Hint 5: While it can't eat in the traditional sense, you do put things into it quite frequently.
ME
What's the answer?
ChatGPT 4
The answer to the riddle is a "fire" or "fireplace." It's always hungry for more fuel (like wood), needs to be fed to keep burning, and the heat from the fire can make your hands red.