Feng Shui Energy Cleansing

How to I transfer positive energy to another person and/or clear their negative energy without them knowing?
I am a teacher and have a student that brings in so much negative energy that it affects the entire class period. There is a tension felt by everyone and I am probably one of a few that know where the tension is coming from. My classroom is feng shui and is a very positive environment until this one student comes in. Go figure, the student sits right in the chi center of the room. The whole class could have a much better experience if I could just cleanse the negativity. When this student is absent, the energy in the room is wonderful.
Only problem is this is a student that can’t stand me or the class. I have to be very careful because it’s school. No fire or seemingly religious rituals.
I had a horrible b*tch sitting next to me at work for awhile. I tried aromatherapy. I took a few drops of a relaxing essential oil, mixed with a few drops of almond oil (which is basically unscented and makes the essential oil go further) and put it in a small glass cup. Then I put it on one of those electric candle warmers. No fire, no religious, it’s just an air freshener, right? Might help.
Look into the uses of the different oils and see which one(s) might work for you. I personally like orange with a drop of peppermint mixed in. Orange is for stress, peppermint is refreshing. Plus it just plain old smells good!
Khama’s Interview with Sheri Ruston (Feng Shui, 4 Pillars of Health, Space & Energy Clearing)