Don't feel bad about it, probably you can get a replacement easily. A towel would do the trick pretty well, good idea, now I know what to do if something like that happens to me... please don't forget to upload a pic of your Betta boy, we want to meet him!
I burned the lamp hood at the canopy of my 29g bow tank as I left 60Wx2 incandescent bulbs close to the hood as I was testing something while watching a MLB game... got distracted... ended upgrading the hood with a
DIY canopy I made with parts form the old one and a standard new one I had to buy, now I have 1.5WPG instead of 0.75 so my plants love it!
Pepe
Santo Domingo