Ok setup first:

Double Edge Safety Razor:
Merkur Heavy Duty Double Edge Razor #34C (Cost 37$)
Amazon.com: Merkur Heavy Duty Double Edge Razor #34C (Blade Included): Health & Personal Care


Razor Blades:
Shark Double Edge Razor Blades, Super Stainless, 20 X 5 Count (100 blades) (Cost 9$)

Amazon.com: Shark Double Edge Razor Blades, Super Stainless, 20 X 5 Count (100 blades): Health & Personal Care

Ok now questions:

1. When I shave I always wondered this. Why does your shave areas turn grey?

2. My face is starting to burn after I shave. I'm accusing my pre shave and shave soap. Who's the cause of the burning problem generally when it comes to shaving?

3. If I buy things from sellers off of amazon. Do I need to disenfect or clean before using the razor blades? They came from some company called Lord in Egypt.