Generally, on the first load of laundry, I'll start the wash, add detergent, wait a little, no smell mind you, and then add laundry. At this point a rather foul smell, always the same, of something similar to rotten eggs I suppose? I've never smelt rotten eggs but I imagine thats it. Its always on the first load, and always after clothing added.

Clothes don't smell like it. Just the smell pops up and fills the room. Washer has never done this before. Top loader..

any ideas?