When I'm showering the faucet is usually turned well towards the hot side. Everything is fine and dandy. But sometimes I realize that the water is too hot so I turn the faucet ever so slightly to the right to make it just a tad less hot.
But within 15 seconds, the water has gone from boiling hot to decently cold making me quickly shoot the faucet back to the left. I imagine that if I don't turn the faucet back left within 30 seconds the water would probably be freezing cold.
What causes this? How can I fix it? Is it not possible to turn the faucet ever so slightly and get a moderately warm temperature?