Welcome to the forum mikeq
Sorry that your first post centres on trouble
Personally I have not suffered any problem with the sensors, indeed I don't know what I would do without them now, and I don't think anyone else has written saying that they have had a similar experience to yourself.
You may find that if you post a separate thread to our resident expert it might ellicit a solution at: http://www.xfforum.co.uk/forum/viewforum.php?f=37
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