Do I need to wash the flax and sesame seeds before grinding them? I have a bag of flax seeds and a bag of sesame seeds from Food to Live at  Amazon. I want to grind them in a coffee grinder, and eat their powder.

For food safety and health consideration and best absorption,


are the seeds ready to eat from the bag? 
Do I need to wash them before or after grinding them? If yes, how? 
Do I need to cook them before or after grinding them? If yes, how?


Thanks.
Yes, they're all ready to eat.

Washing them is just going to get them wet, and it'll be difficult to impossible (especially for the flax) to get them dry enough to grind to a powder.

People do sometimes soak flax seeds, or mix ground flax seeds with water, in order to get something to use as a vegan egg substitute, but I don't think that's what you're going for.