This morning I could feel something immediately affecting my breathing when I stepped into my yoga class. For safety's sake I used some ventolin (doesn't happen much), and after I asked and it turned out the teacher had used some incence 2 hours before I got there. I couldn't smell anything. After I felt a lot more tired than usual, and am still recovering (2 hours later), still feel a tad chesty, and my asthmatic friend could hear it. Peakflow fine, though. Have others got such an strong reaction to incence? And does it sound like it could be fine airways?