One possibility for a malfunction of the rotisserie spit may be that it is too heavy or unevenly loaded, so that an imbalance prevents it from rotating evenly.
It is important that the food is skewered in the centre and that the fixation holders grip. Protruding parts, such as chicken wings, must be attached to the food. In the operating instructions available for download you will find further tips on how to fix the food correctly.