I have a very bad ctr and I don't know why. 2606 7 = $2.75 My ads are blended well, or so I have been told. link in sig
If it's the blog in your sig that you are talking about, I would try to change the color of the blog post titles so that the Adsense red links will stand out.
- Remove your skyscraper ad on your sidebar. Having it will hurt your CPC more than it will help your CTR. - Put a rectange 160x90 link unit in the top left of your sidebar. A lot of eyes are drawn there for navigation, and those ads look like navigation links. Plus, it doesn't take up much room. - Your leaderboard catches eyeballs, but it looks like an ad despide the blending. Almost all leaderboard ads look this way. I've never worked on a white background which makes it more difficult (I think), but this is a spot you want to be more creative in.
Try to optimize your ads palcements. Try different ad units; 250*250 ad unit can help you increase your CTR.