Travelling in NY cabs?

Hi, im visiting New York this year and on my past seven visits i have been feeling really sick and when i was 10 i was actually sick. I think this is mainly because of warm weather and the leather hot seats. This is when i travel from JFK to Manhattan. I have been doing this since i was six but recently been feeling really car sick. I have thought about taking the Sky train then onto the subway but it's too much hassle. Anybody have any tips for stopping or helping this problem? Thank you