It is never a matter of ‘if’, but ‘when’.  I’ve read this about a few things including in relation to your underwater camera housing.  While descending onto a reef I noticed a few tiny bubbles coming from my camera housing.  Upon further inspection i saw tiny streams of water inside the housing.  I was able to immediately tilt the see thorugh housing so that my digital camera didn’t get too water logged.  And since I was down only about five feet, I was able to re-surface and have the guys on the boat retrieve the camera and dry it off.  Luckily the camera was saved.

So why did this happen?  Carelessness.  I opened the housing several times this trip to download the pictures to post on my blog.  But not once did I ever apply more silicone to the o-ring.  Upon further inspection there was a tiny hair stuck to the o-ring.