I installed Mtn. Lion on my MacBook Air a few months ago. Since then, I've had a problem waking up my MBA, and this seems to be occurring more and more frequently. (Or I'm just finding it more and more annoying!) I've tried most of the solutions recommended in the Forums, but I haven't tried a clean install. I'm frustrated enuf to try that now... How can I create a flash drive of ML to do a clean install? BTW, while I will do a backup before doing the clean install, will the clean install wipe out my whole hard drive or just the OS portion?