Touchpad not gliding as well

[Racktacular]

I've had my macbook for about 2 years now and it has been great, but have run into a little annoyance. When I run my finger across the touchpad it slides great until it gets to the middle. I think, over the years, oils from my finger are causing the center of the touchpad (when I usually scroll around) are building up. It is just kind of annoying that my finger can slide like butta on the outside, but not in the middle. Anyone experience this before? What is the best solution?

 

[pazreal]

I would try some isopropyl alcohol on a q-tip to break up some of that grime and grease.