How does a person know when a tea kettle is boiling when they own a tea kettle that has no whistle? Do you have to run over several times and open the
![How much does it cost to boil a kettle? Here's the most efficient way to boil water | Evening Standard How much does it cost to boil a kettle? Here's the most efficient way to boil water | Evening Standard](https://static.standard.co.uk/2022/08/30/12/gettyimages-1369185764-612x612.jpg?width=1200)
How much does it cost to boil a kettle? Here's the most efficient way to boil water | Evening Standard
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