I've started making dairy free cheese for cafes. Similar to whisking a sauce for 5 minutes. Ive tried scaling up using a bamix stick blender with large Raymond Blanc non stick pot on induction cooker this leads to problems with grey flex appearing in the cheese? Any advise much appreciated.
It is probable that the blades on the bamix stick blender are contacting the interior of the pot occasionally and scratching some of the non-stick coating off, and that's the grey flecks you see in your cheese.