If the spoiler (C) will be reinstalled, check the double-sided adhesive tape (D) that attach the spoiler spacer A and the spoiler spacer B to the spoiler for damage. If the double-sided adhesive tape is damaged, remove the spoiler spacers from the spoiler. Scrape off the double-sided adhesive tape from the both sides of the spoiler spacers, and clean their surfaces with isopropyl alcohol.

Scrape off the remaining double-sided adhesive tape (E) from the spoiler, and clean it surface with isopropyl alcohol.