A couple of days ago, I turned my oven on, did some baking, and there was very strong, plastic or insulation burning smell. The oven worked fine, but now, the ignitors for the stovetop burners don't work (none of them work). The stove still works if you use a BBQ lighter, but where should I start looking? I popped the top, and there were some mouse droppings and bits of insulation in there.

Any help would be appreciated.