Why does my rice get hard in the fridge?

Chef's answer
If none of those options are feasible, you can also chill the rice and reheat it in small batches with a few drops of water. Harold McGee says in "On Food and Cooking," "Leftover rice is often hard due to the retrogradation of the starch, which is cured by heating it up to the gelation temperature again.
Frequently asked Questions 🎓
When reheating cooked rice, make sure it is steaming hot all the way through ( 19 ). Rice is a high-risk food due to Bacillus cereus. Spores of this bacterium can live in uncooked rice, and can grow and multiply once rice is cooked.
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How does reheated rice cause food poisoning? ... The spores can survive when rice is cooked. If rice is left standing at room temperature, the spores can grow into bacteria. These bacteria will multiply and may produce toxins (poisons) that cause vomiting or diarrhoea..
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Rice flour is made from ground raw rice and is used to make rice noodles and some pancakes, such as South Indian appams. It can be used to thicken soups and stews, as well as providing an alternative to wheat flour in cakes and biscuits. However, it's gluten-free so can't be used to make yeasted loaves of bread..
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