The water from the tap has a certain amount of calcium in it, it’s not fat. That act of boiling water will make it so a some of the calcium carbonate will precipitate out of the water onto your kettle. This can come loose over time and with use of the kettle and form little flakes in the water. It’s nothing that’s not already in the drinking water and is perfectly safe
Something else I’ve noticed about my own kettle that might be contributing. I store my kettle very near or sometimes just on my stovetop. If you fry anything nearby, even with a wipe down/cleaning you can still get small amounts of fat splatter on enough of the kettle that some of it may be making it’s way into the spout or underside of the lid that then gets mixed in by the steam inside when you boil water next.
Kitchens can be very greasy places. Do you ever cook food in a pan near your kettle? It could also be from whatever container you poured the hot water in.
The pot you boiled the water in has fats stuck to the bottom which came unstuck during the boiling.
Could you explain how fats would end up in kettles? Since tap water should be the only thing going in
The water from the tap has a certain amount of calcium in it, it’s not fat. That act of boiling water will make it so a some of the calcium carbonate will precipitate out of the water onto your kettle. This can come loose over time and with use of the kettle and form little flakes in the water. It’s nothing that’s not already in the drinking water and is perfectly safe
Something else I’ve noticed about my own kettle that might be contributing. I store my kettle very near or sometimes just on my stovetop. If you fry anything nearby, even with a wipe down/cleaning you can still get small amounts of fat splatter on enough of the kettle that some of it may be making it’s way into the spout or underside of the lid that then gets mixed in by the steam inside when you boil water next.
Yeah I forgot about oil particles (?) being ever present in kitchens
Kitchens can be very greasy places. Do you ever cook food in a pan near your kettle? It could also be from whatever container you poured the hot water in.