Because to use it at home so we can put dishes to wash in the dishwasher.
to clean dishes
I found that the decorations came off with dishwasher use.
You should not use laundry detergent in your dishwasher. It produces too many suds and the dishes will not rinse correctly.
According to the link and my experience, the seals could dry out if you don't use the dishwasher for a really long time.
Soap that is not formulated for a dishwasher can make a lot of suds. Be very careful if you use Borax.
Modern dishwasher "soap" is actually a no rinse detergentfirst developed for the US military for use in mess hall dishwashers to help reduce the incidence of food poisoning in troops. Never use soap in a dishwasher!
No. It will leave a film on dishes and not clean well.
Fitting for WHAT.
The current #1 rated dishwasher is the Samsung DMT800RHS for $800. The GE GDWT160RSS is #2. You can see the top 10 at http://dishwasher-review.toptenreviews.com/
Yes, you can use CLR in a dishwasher to clean lime/calcium deposits that have built up. Source: CLR manufacturer website at related links.
You can use the dishwasher for cleaning earthenware dishes but you should not use bad chemicals or powder. For handmade pottery you need to check with the maker but modern commercial dinnerware, which has a glaze applied over the decorations, can be washed in the dishwasher.