I have an electric water boiler in the kitchen. I put fresh tap water into it, boil it up, and use it for my coffee. Then, an hour later, I go back and press the button again and have it re-boil the now room-temperature water, and use it for another cup. Sometimes, several hours pass; sometimes, half a day.
When "too long" has passed, I tend to empty it and put fresh tap water into it, because it feels like it has "gone bad".
Is this silly? Can water really "go bad" like that? Is there any difference whatsoever between freshly poured water and water that has been standing still in the container half a day or even the entire day?
It's still gonna be boiled? Doesn't that "neutralize" basically any kind of water?