Last weekend, I used my dyeing tray to dye some rainbow coloured fabric for a nightie for Jalisa. I covered it with garbage bags and left it for a couple of days. I checked on it over the course of the two days that I left it, but boy did I recieve a surprise. I found all these little blue rings all over the fabric. Tiny crop circles if you like. It was a bit of a mystery at the time, but I think I have the mystery solved.Can you guess what caused the blue circles?