Hi all I had problems with the arms in the drum as the holes in them were not showering the clothes.
So I took them off and saw in amazement, there were limescale in the arms and covered up every hole so I put a load and rinsed and spin them without the arms and there was plenty of rollover and no spin ballance issue as allm areas of the drum were covered.
But no the arms are clean and are now back in the drum, they just click into place.