Hi all! I just bought a rain and light sensor and I am thinking of replacing my old rain sensor with this new sensor. I have to remove my old reflector of old rain sensor from windshield and stick the new reflector onto windshield. Does anyone know what kind of material I should use to stick the reflector onto windshield? What kind of glue should I use? Thanks for any input.

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--2004 E53 X5 4.8is - ECE version; right hand drive; Located in Hong Kong; ext. black sapphire metallic; int. leather black; adaptive dynamic bi-xenon headlights; 16:9 onboard monitor w/o navigation; 20" genuine BMW Y-spoke 214 wheels with Bridgestone Dueler H/P Sport tires; Int. rear view mirror w/ compass.