2002 Kia Rio It stinks!

After driving for a while there is a plastic burning smell coming from the front of my Kia. It has the exact same odor as a burning plastic frying pan handle on a gas stove! I check everywhere: no leaks, no burn marks, oil level perfect, brake fluid fine, transmission fluid fine, radiator liquid level fine. None of the hoses have any burn marks on them that I can find. I did not look under the vehicle.

When I open the hood I cannot distinguish where the odor is coming from.

Can you help me before something starts a fire?
Roseann