My base 13" MBA is 5 months old and I'm having two issues, one physical and one with software: 1. WiFi is dropping out often, I've gone so far as to installing Lion all over again to fix it. It works sometimes now. 2. There are some weird little spots developing on top of the screen. All the time. I try wiping them witha microfiber cloth and can usually get some of them off but they just reappear again. I don't smoke, drink or eat next to the laptop and I don't have a pet. My apartment isn't dirty nor do I take it to dirty places like the park. I keep it in a ACME sleeve (made out of the scubasuit material) I take it to the Genius Bar about 4 weeks ago, I explain everything nicely to the guy but he refuses to replace it. The unit is clearly faulty and I want to get a new one while I am under warranty. What is the best tactic to get it replaced?