So I just bought my first straight razor from The Art of Shaving. It's a carbon steel blade.

After a couple of uses, I looked at the blade and noticed some dark spots on it. I can't remember if those were there before I used it.

Anyways, is this normal? Is there a way to get them off? Also, I've noticed a lot of..."residue" buildup on the blade, whats the best way to clean the blade?


Thanks!