? regarding my airbags & Leaking.

[jeff1vol]

Do you normally lose air pressure after a period of time? I found myself having to refill my bags after it sat in the garage for a couple of weeks. They weren't totally out of air, just lower then they were when I parked it. Is this normal (like having to put air in your tires periodically) or do I have a leak that must be fixed? I had to put air in all four.

Obviously, there must be a slow leak somewhere. I don't have a compressor set up at the moment, I'm using 4 schrader valves presently. What is the best way to find the leak and where would you look first? In other words... where would they "most likely" be leaking air?
Thanks,
Jeff