Hi, I just bought a 2008 Certified Lexus IS 250 from a dealer in the S.F. Bay Area. The interior has a really strong chemical smell. I didn't notice it until I had it a couple of days. I took it back to the dealer and they said they had a company do an ionization treatment with UV light for a day and a half. When I got it back, it had more of a saddle soap odor, like a leather treatment. However, after 4 days the original chemical smell is coming back with a vengeance. It's actually nauseating after being in the car a short time. I keep the windows and sunroof open when not driving it - to no avail. It's not A/C related - you can get in the car after it's been sitting wide open overnight. Anyone had a similar experience? I'm getting ready to take it back again. Thank you!