Your kitchen machine can deal with very heavy ingredients – for example bread dough – and the rotation of these types of ingredient can tighten the bowl into the machine and make it difficult to remove. In these cases extra force in an anti-clockwise direction will be needed to remove the bowl.
If you regularly make dough we would recommend the bowl is periodically loosened to avoid over tightening. Alternatively a bowl with handles is available from Kenwood Spares via www.4kenwood.co.uk.