Unscrew the crown to the winding position (the first position) and turn it clockwise about 30-40 times.
Real Rolex Submariners have a Rolex logo, engraved rehaut, high-quality finish, and a serial number. The movement of the second hand should be smooth, not ticking.
Pull the crown out to the second notch and turn it clockwise to adjust the date.
Use a soft cloth for light cleaning. For more thorough cleaning, use warm soapy water and a soft toothbrush, but ensure the winding crown is tightly screwed onto the case before cleaning to maintain its water-resistance.