If you have previously recommended this thread, you should see a tick / check mark on the recommend button. Click the tick to undo the recommendation (the tick may appear to change to a cross as you do this.) If you added a comment with your recommendation, you will need to delete that from your facebook wall separately.
Sorry this is old, just come back to it. We don't use it to be honest very often. Costs for each card which are in levels so each time you move a level you need a new card (unless they have upgraded the system) a treadmill without is much cheaper. We only got it cos it was a refurbished model and therefore cheaper.