Get chemical smell out of car? Help?

[20115.0]

What you describe as a sweet chemical really sounds like a small core leak. If you turn on defrost and fan on high you will notice slight hazing on front window from air/coolant blowing on it. Any good mechanic can identify this by smell.

[20115.0]

Your a/c and heat can work fine and no wet floor and still have a leak

[asus389]

Regarding testing a coolant leak. Is there a valve between the coolant system in the engine and the heater core in the cabin that would be shut while the car is off? I ask because they typically do a pressure test with the car off and engine cold. So if the coolant doesn`t even flow to the heater core until the the car is on and warmed up (and you turn on the heat) it would stand to reason that you`d never catch a leaking heater core using a typical pressure test. Or am I not thinking about this correctly?

EDIT: In answer to my own question, this car doesn`t have a valve it uses a flap to acetate hot/cold air.