Try a different vender. I have CF roundels and do not have this issue. I also used to live in southern AZ.
I think I bought mine from http://sv-concepts.com/
Performance |Dinan Stage 3 Software|Dinan IC|Dinan OC|UUC/Corsa Exhaust|Koni FSD Shocks and Struts|Eibach Spings|Hotchkis Anti Sway Bars|6MT|Style |Aero Lip|Aero Rear|M3 Spoiler|BMW Gloss Black Kidney Grills|BMW Aluminum Pedals|BMW LCI Tail Lights|HID Fog Lights|25%Tint|Advan AVS Model F7 19" Rims|Lux V3 AEs|Premium|Sport|Comfort Access|