No problem at all, Dave. Thanks for your help!

Rhett, thanks for sharing your similar experience. I noticed mine glowed by accident as well. Unfortunately, it was in my bag for a while. Fortunately, it was my best disc so I refused to use it on holes where I might hit a tree/gravel/concrete/etc, so even though I used it, it's still in fantastic shape. It was when I removed it from my bag and carried it up to my room to put on my disc wall of fame that I noticed it glowing when I turned the light off. Needless to say, it took me by surprise!

And don't worry, I'm definitely keeping this one safe and sound.

Thanks again to you both!