I would think that the climate here in the NE US would be about the same as in the UK. We havent had a day under about 75% humidity in a month now, not to mention the constant rain and thunderstorms here.
Why does this seem to only be a problem on the UK cars? I cant imagine its the climate.
LOL maybe its the extra bangers and mash you had at the pub with the 20 or so pints every other night