No, dishwashers are not bad for the environment. Most of the dishwashing powders and liquids are made with biodegradable materials that do not affect the ozone.
According to the link and my experience, the seals could dry out if you don't use the dishwasher for a really long time.
Place them in the holes in the bottom. They might seem tight at first, but just keep pushing.
Thay dish maybe infected already of some germs that might affect on our health when the time we use it.
no