What should I do if air is leaking around the valve?

This is perfectly normal. Vibrations happening during transit may untighten the air valve. Vibrations from moving or handling the product around can also eventually slightly untighten the valve.

Worry not, you simply have to screw it tighter!

1.  If you suspect there is air leaking around the air valve, apply soapy water around the valve. If bubbles are forming, this means there is indeed an air leak.
2. Completely dry the area.
3. Deflate the board.
4. In the repair kit, you will find a valve wrench.
5. Remove the air valve cap.
6. Insert the wrench.
7. Turn the wrench clockwise to tighten the valve. 
8. Testing : Inflate the board to 15 PSI. Apply soapy water around the valve. If there is still a leak, start over from the top and test again.