speedfreek

If I am understanding you correctly you are not getting grey spots on paint as the OP posted way back when. Instead you are having an issue with your the edges of your clear bra and dirt build up, correct?

If the clear bra was installed correctly then the dirt is not trapped under the edge of the clear bra. I am not sure the best method to remove dirt buildup on the edges of the clear bra without potentially hurting the paint in the process. A bit of elbow grease in the trouble spots during the wash or take a microfiber (after a wash) and use some quick detailer and your finger nail to go along the edges to try and lift the dirt. Again that isn't going to be great for the paint.

Maybe include some pictures of what you are talking about to help troubleshoot.

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