I went through two, before I tried the best fix EVER. Black car, so I used black electrical tape and wrapped the tape as far back as I could get. Have to change the tape out about once a year, as it fades, but it has held up great, and no one has noticed until I pointed it out to them.
I thought my problem was due to the front end being tweaked from a previous owners misfortune, but it appears to be a fairly common problem. $40 from my dealer, color matched to the car. Could do lots better at Niello with the NSXCA discount.