Had same issue when I bought it used a year ago. Drove me nuts! Finally, before a good detail, I sprayed all "those parts", with Fantistik spray cleaner and used a brush, then hosed off. Then buffed, waxed, and trim, handles and roof rails had 303 applied. Streaks gone! Been about 7 months, 8k miles plus another 3500 miles towed by motorhome. Good luck with yours...