Seeeee? She was RIGHT!! They wouldn't be doing anything with even the smallest possibility of starting a fire...unless they opened the windows and used the crystal balls to focus the energy from the sun but that kinda seemed more like Professor Airey's kinda thing so definitely not.
Lex hopped up and took one of the bigger balls. If there was something inside then she needed a good view. She wanted to SEE! Ahem, about this polishing business. There was a charm she learned to get glass clean...these were made of glass, yeah? Not some similar in kind material that might shatter when exposed to magic? As amusing as the thought of a minor explosion was, she didn't figure it'd be that amusing when she was sent out of class sooo....Alexa grabbed a cotton towel then took her seat once again.
She blew on the glass a few times, getting that fog stuff on it then began wiping in small circular motions to get any and everything off it. Wouldn't want to end up seeing something only it's the wrong something because there was a finger print in the way.
That was the difference between sleeping well at night and asking to bunk with the Divination or DADA Professors themselves.