Dishwashers wash everything except that vessels that are burnt. That is the cases where your food is burnt. In all other normal cases, you just need to keep your dishes on the trays of the dishwashes in inverted fashion so the water jets splash hot water into the inner sides of the vessels.
Most dishwashers contain two trays to keep dishes, of which the below one is mainly to big vessels, like kadai, etc., while the upper tray is to keep plates, cups, drinking glasses etc. Some expensive dishwashes, which are above rupees 70 thousand have even three trays to keep your vessels. But you should note that 3 tray dishwashers are bulkier than the others.
How healthy & hygenic are the dishwashers
Dishes in dishwasher are washed with pressurized hot, sopy water splashed onto to the inside of the vessels arranged on trays. The temperature of the hot water can be adjusted, and is 70 degrees in general. If you take little expensive dishwasher, you can choose better washing modes.
Dishwasher suitability for Indian kitchen
Almost all popular brands are suitable for Indian kitchen, becaue all these dishwers have provision to keep bigger vessels for washing such as fried pans, which are mandatory in India, since lots of friend food is used.