Why Brushing Your Teeth Makes Orange Juice Taste Bad

If you're going to have a glass of orange juice and brush your teeth (a good idea), there's only one order in which to do them. It makes sense that your minty toothpaste-mouth would make OJ taste weird, but why so down-right heinous?

As Bytesize Science explains, it's because your tongue gets coated with a particularly troublesome foamy oral detergent.