Looks like Cascade in the kitchen faucet
My father-in-law's faucet screens keep filling up with little teeny white grains that look sort of like Cascade dishwashing granules. I have not tasted them yet. Is it possible the dishwasher was installed incorrectly and the stuff is migrating into the faucet? Seems unlikely, since the same granules are accumulating in the bathroom faucet too. Any ideas?