Howw do you clean lime deposit out of cast iron tea kettle?

A product called CLR, and there are several varieties and are also environmentally friendly to boot. My copy and paste isn't working, darn! Go to "clrbrands.com" and you can see their entire product line. Not expensive, sold in many grocery store chains and almost any hardware or home improvement store. I have been using it for decades. Really great on shower heads too!

Hey there having cast iron myself I watched and learned from a chef whom made a corse salt paste with tiny bit of water at a time, rub it well into the iron and let it sit for awhile in a warm oven now here's the trick when able to handle the teapot take a piece of foil and wet the teapot where cleaning needed and crumble the foil which me but when you rub it, it actually smooth out and it removed the rust and gunk right off of my skillets I hope this will work on the lime build up

Hi Suzanne, hope this helps you out.

Fill the kettle ¾ full of either water and one lemon, or with equal parts water and vinegar (household vinegar is fine). Let it soak for one hour. Boil the kettle (three times for lemon, once for vinegar) Allow it to cool, then rinse thoroughly several times.