Car Accessories Antenna

the FM transmitter for iPhone makes crackling sound when playing music.?
I was wondering if there was any way to make the crackling sound coming out my car speakers stop. I thought maybe it is possible to wire my car antenna wire (going to the back of the head unit to give you the radio stations) to my cigarette lighter (when the FM transmitter is plugged in) so I would get a better reception. If I can do that what I just put a wire from the wire antenna ground wire to the cigarette lighter? I have this FM transmitter: http://www.argos.co.uk/static/Product/partNumber/5242038 / C_1 / 1%% 7Ccategory_root 7CHome Entertainment + and + + +%%% SAT nav 7C14419512/c_2/3 7Ccat_15701190 7CiPod + and +% + MP3 Accessories 7C14419709.htm Thanks for ideas:)
This is standard with FM transmitters, none of them seem to work well.
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