Magical Grain
Some questions lead to enlightening answers about nature, people, and the world around us. Others make you wish you’d never asked the question in the first place. When this OP spotted these mysterious grain-like things in her closet, she had no idea what she was looking at.
She even cleaned it out only to see that they had magically reappeared. After this happened a couple of times, she just had to ask the wise people of the internet what this could possibly be. The answer? Termite droppings. Oh, heck, no! It’s time to throw that cupboard out and burn it for good measure!