They are about a half an inch thick. I rinsed 3 times yesterday but I'll do more today. I don't see any mold
If you still don't see mold then the smell is just that particular seeds smell. Some are smellier than others. I primarily use wheat for this reason. If I experiment with a different seed and it stinks, then I toss it to the chickens and don't use it again. Mine are in my kitchen so I don't want any with icky smells.
In the beginning you just have to experiment in small batches to see what wotks best for you.