As a kitchen designer for nearly 30 years I feel I can comment with some experience on this one. Recent exaustive consumer tests carried out by the BSH group which incorporates BOSCH, SIEMENS, GAGGENAU and NEFF appliances, prove conclusively that dishwashers are not only much more hygenic, but actually use less electricity & water than was used in conventional hand washing-up. Bearing in mind that you normally wipe each item with the same drying cloth which gets progressively wetter the more you do! As already mentioned in an earlier posting, you cannot possibly use your washing up water at anywhere near the same temperature that is achieved in a dishwasher or the drying heat. Refering to the stains sometimes left on items usually glasses, this is most often due to the user not cleaning the filter regularly enough, ideally this should be done after every use, takes 2mins. My recommendation would be to go for a model that is 'triple A rated' (Energy,Water,Drying) this will ensure top quality finishing at lowest cost perfomance for each wash. And above all, as the point has already been made, You don't have to stand with your hands immersed in water whilst your guests enjoy the remains of your wine! Or worse still after everyone has gone home, you still have to face the washing-up or go to bed and get up to it in the morning- not much fun. To sum up, those that have never had a dishwasher, will always find reasons why they are no good, whilst those that have one, in most cases, would never go back to the old method.