8. How to find the hole in your tire:

imgur

If you are losing air in your tire, but can’t find a nail/screw/hole: fill your tire full of air, take off your tire and get some dish soap and water. Bubbles will develop where ever there is a leak. If the hole is in the middle of the tire (like seen here) you can get it repaired for a few dollars. If it’s on the sidewalls, you’re not so lucky.