Flickering Dash Lights.
 

I drive an 06 PT cruiser Touring edition.

The dash lights started flickering. It was really subtle at first. Now it flickers from super dim to to maxed out. (I generally run my lights on the dimest setting).

I did notice there was a ton of corrosion on the battery and have started clearing it away, but that has done nothing, but seeming to make the flickering more constant.

Also sometimes it doesn't just flicker, but it will go from dim to bright and remain bright for an extended period of time, then finally go back to dim.

I have not noticed my headlights flickering at all.

Any help would be greatly appreciated. Thanks