Morch DP6 and vertical damping - pros & cons??

I am setting up my tonearm, a Morch DP6. The instructions that come with it tell you how to add the included silicone fluid for vertical damping (at the pivot point) but also mention that this might not be a good thing to do (can't remember the exact wording.) The instructions do not say why you might not want to add the fluid to the pivot point. Can anyone tell me why or why not the vertical damping should be used? Does it effect the sonics in a possibly negative way, or....? I will be using the arm on a Teres 160 turntable with the basic ZYX cartridge, R100H.

Once the fluid is in there, it looks as if it would be nearly impossible to remove, so I would like to make an informed decision about whether or not I should use it.

Thanks,

Holly