Fitted dishwashers - recommendations, comments

[diesel head]

Sorry guys a very very boring topic, my parents dishwasher, is built in and is just not washing properly, things come out either not clean or with a film of something??? on them so everything has to be either re-washed or rinsed again, so far we have called out a dishwasher repair guy twice, (in the last couple of weeks at total cost of £200) for different issues but now this, we are thinking that it might be better to replace the whole thing.

(We live in a hard water area if that information is useful)

Questions are could anyone recommend a built in dishwasher, and would it be feasible for my father to fit it, he is a very competent DIYer and has plumbed in our washing machine in the past but has never fitted a dishwasher into a fitted kitchen, easy? hard? comments?

Thanks

[diesel head]

Thanks for that, my mother is fanatical about keeping it topped up with salt and rinse aid so I'm confidant its not that, and if they do replace it it would have to be with another built in unit, not a freestanding one

[diesel head]

Thanks guys, I am reasonably confidant that lack of salt/rinseaid is not the source of the problems, my own theory is that not enough water is getting to it for some reason, although my mother disagrees with this theory and is hoping that it is just being overloaded (unlikely as she loads the same stuff in week in week out and its a full sized dishwasher and there is only two of them)

[diesel head]

Thanks again guys but my mother only uses finish tablets in the dishwasher.