My CS 200 CAD has a gremlin, when I came back from yesterdays ride, and checked the file, it told me I had cycled 23 miles at an average of 17 mph, it had taken me 1h18m ( seems fair enough), but, at an average cadence of 23! spooky...Especially when you consider that the cadence meter is sat in the shed, completely detached from the bike, mainly because I cannot get it to fit the frame on my bike, and the magnet kept coming off the crank arm. I have emailed Polar, but have not had a response yet. Have any fellow 200 owners had a similar experience with this gremlin? My Polar is only 8 months old, has never been dropped/got wet/cold/been used near to any other form of electromagneticy type of thingy. Any suggestions?