I came across this amazing site called https://dishwashingexpert.co.in It has all the information and videos required to understand a Dishwasher in India. Helps me use mine much better now.
As dishwashers need special detergents, Finish is a brand which is internaltionally recommended and gives amazing results on Indian cooking stains. It is easily available online via https://buyfinishonline.com They deliver free of any shipment charges anywhere in India. They have a call center number too 1800 102 2299.