Have you tried playing with interactive type toys an hour or so before you go to bed? Wear Lexie out with feather toys, laser toys, anything that will get her energy levels roaring for a while. Maybe even a toy like a Turbo Scratcher (if they have them there) will get her more active. Is she maybe being more active toward breakfast? If she has more food toward night she's more apt to settle down and sleep hopefully. Hope you figure it out so you can get some proper rest.