Any tips on trim treatment? My Black to Black is good, but one little drive in the rain and it always comes off

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2004 BMW X5 4.8is [Black Sapphire] / [Black Nappa] [Nav] [DSP] [Style 87]
2003 BMW 540i [Sterling Gray / Gray]
[Msport] [Mods from A-Z] [Two-tone Interior]