After a few operations, that went all good, suddenly a grey smooth material (that is definitely not a substance of eating or remains of bread ingredients) appeared below the cycling-blending thing. We suspect it is the sealing ring, wrapping the axis of the blender, that got melted. We don't want to use the machine anymore, since we don't like the idea of having molted polymers in our bread. Any solution or information about this problem are welcomed.