Yes I know it's their responsibility, but I can't see the same maintenance even in SC-NZM Duronto. I have travelled from NZM to SC a couple of months ago, when they haven't cleaned the washroom or coaches through out the journey let alone the presence of OBHE staff.
Sadly, Nowadays SCR maintenance of its LHB trains is not up to the mark compared to the ICF days. I think only COA and KCG are still continuing the famed maintenance standards of SCR.