PHILIPSS9111 S9111/12 Series 9000 Face Wet and Dry Electric Shaver with Detail Trimmer (100-240V)

When you dry shave do you wash your skin first, or shave before you wash? Does it matter? Does this shaver glide well or does it "stick" to your skin?

How come half the price of the S/9041, same 9000 series?

Is this waterproof? Can i throw it in water and wash it?

Does this include a charger and/or cable to charge it?