Comment Moderation ON

I am sorry to have to do it, but I have turned comment moderation on for this blog. For a while now, I have been having trouble with spam comments that I have to go in and delete (bunches of chinese characters). That's why if you look back at some posts, you'll keep seeing comments that have been deleted. I would like to contact Google/Blogger about this, but they do not provide for feedback - at least, that I could find. So, until they stop, I'll moderate.