Possible to be slipped LSD on doorknob?

[Arandur]

Liquid LSD in food or drink aside, is it possible to be drugged (against your will) by someone having poured liquid LSD on a doorknob or car door handle, which later dried? Would it still be a threat once dried?

I realize this may seem an entirely ridiculous question, but I really would appreciate an answer if anyone can help. If you knew the circumstances behind this peculiar request you might feel sympathetic. Any information on how long dried liquid LSD can remain potent, at or above room temperature, on a metal or plastic surface would be much appreciated!