GPS nav, part 2

[darkoshi]

I discovered today that the Pharos unit has a stylus which can be pulled out and used for the touch-screen. Using the stylus, or even my fingernail instead of my fingertip, the touchscreen responds quite well. Is this common with touchscreen interfaces, that you shouldn't actually use your fingertip?

The documentation that came with the product seems quite lacking, in that it did not mention the stylus other than showing it in a diagram of the unit, nor several other things about the unit.