This stinks
I guess it's easier to just try to get a teacher fired than it is to simply instill decent hygiene habits in your kids. And no, I don't believe for a second that the teacher sprayed anyone in the face with a can of Febreze.
My son used to hang out with a smelly kid once. I don't know if the kid had a dietary imbalance or was just filthy and unaware of how badly he smelled, but I had to drive him home a couple of times, and wanted to puke every time I did it. Fortunately, my son stopped hanging around him pretty quickly (the kid had some other personality quirks that made him less-than-pleasant company) and it wasn't an issue. But let me tell you something: If I had to work around the kid every day, or even on a regular basis (this is a music class, so let's say, weekly), I would have pinned him down and slathered him in Right Guard.
Some of the crap today's teachers are forced to put up with is really unbelievable.