As much as Theo liked the idea of a clean castle, he was getting rather sick and tired of the professors making them do all the work. He supposed that it was good learning for when they grew up in the domestic world, but still, this was all very excessive. Theo looked at the spell that was newly written on the board. He'd never heard of it before, so that was great, it probably wouldn't work out how he would want it to.

Vee-truh-MOH-nee-uh.

At least the pronunciation at the bottom helped out again. The wand movement was pretty easy, too.

Theo made his way over to a window that was looking particularly filthy. He pulled out his wand and give it a wiggle, to get himself warmed up and stuff. But needed to get the incantation right, first. Placing his wand by his side, Theo glanced back at the board. "Vi-tru-monia." It was actually quite easy to say, so he wasn't too worried.

"Vitrumonia!" The Slytherin waved his wand over a corner of the window and watched as it cleaned up. Woooooooooooooah, awesome. He continued to cast and wave over the remainder.