How easy is it to take out the gauge cluster? Is it just a couple screws or do you have to remove part of all of the dash? I need to clean behind the lenses covering the speedometer and tach...I have what looks like trails of some type of liquid that start at the bottom of both lenses and trails out to the top. It looks like it has dried. I don't understand what could have got under the lenses. Thanks in advance for the assist.