How to fix a blurry eye lens on a Nikon DX3000?

I'm going to apologize in advance for my lack of knowledge in the proper labeling of my camera's anatomy, but the Len that you look through to see what you are going to take a picture of (possibly called the viewfinder) it's right above the screen. Well that lens is somehow blurry on my camera. When I take a picture it looks fine, not blurry at all. The information on the bottom of the Len's screen is also blurry. I tried to clean it but with lens cleaner and a Q-tip and it didn't work.

Right next to the viewfinder you will find the Diopter Adjustment control… That you simply slide up and down to adjust the focus of your viewfinder. Your User's Manual has a whole page devoted to this subject… Page 23

If you don't have your Manual, download (and save it) from Nikon.com
Here it is… Http://www.nikonusa.com/pdf/manuals/noprint/D3000_ENnoprint.pdf

Adjust diopter. Look up in the manual.