Did you know that laundry detergent can glow in the dark? I used a chunk of Oxyclean in a laundry cycle that held a flannel bed topper on which my cat loves to sleep curled up. When I turned out the light there was glow to it like stars. When I touched it I found invisible flakes of detergent had been caught in the fibers. A few days later only a few specks are left but I still marvel at all the things that glow in the dark…hurrah for the glory of optical brightens day and night!