Because of the sulfur. Sulfur itself has a bad odor, and anything that contains a lot of sulfur also has a bad odor.
Yes, and no. They wash dishes but not laundry.
At room temperature pure sulfur is yellow and hasn't odor.
to wash your laundry
A normal laundry wash will clean it out.
Non-pure sulfur has a faint smell of rotten eggs
Sulfur is a yellow solid and it is known for giving out an unpleasant odor, Sulfur Oxide.
Yes, sulfur has a very stinky odor, similar to rotten eggs.