Sometime common sense, as someone else suggested, isn't the best way to go
when
you are dealing with future health issues

and some times it is. If you are worried about fumes, ventilate. At our
retreats, the ovens are outside. I use a fan, my oven is in the garage. If you
are concerned, then buy a thermometer, a fan, open the window, put the oven in
a separate place and be careful!
Sarajane

Sarajane's Polymer Clay Gallery
http://www.polyclay.com