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You need to ask at radio shack or similar electronics store for some kind of gell that will connect the rubber strip to the display. These displays show the information that runs through the rubber strip(fiber optics, I believe?).
It is critical to get a near perfect connection between the two.
Also for cleaning, I would ask a tv repair man what kind of spray solution he uses to clean circuit boards.
Also, whenever you are dealing with electronics, there is a possiblility of causing static which can wipe out a programmed chip on one of the circuit boards. That is why some components that are ordered come in a static free plastic.