Caring for your cookware is one of the best things you can do to save money. First, make sure your kadai is properly seasoned. Next, don’t use a scrubber on your kadai, rather use a sponge with detergent. For very stubborn stains you can mix some baking soda, vinegar and water and heat this solution in the pan itself. Then, using a sponge, wipe the solution over stains or marks. Once the iron kadai is clean and dry, then should be no need to re-season it. In case food starts sticking or you don't plan on using your kadai for a while: after you have cleaned and dried the kadai, spread a thin layer of oil prior to storing it. There is no need to heat this oil.