Hi, While I was watching guitar lesson using Garageband app, I heard my MBA's fan spinning noisy. I check the temp using istat and found out that it went up to over 90 degree Celsius. So I restarted it and it came back to normal temp around 50 degree. Is there anything wrong with my computer? Also, I have clear seethru plastic case and keyboard cover on the MBA, do they obstructs MBA's heat dissipate? i am using 2011 macbook air 13 inch i5. thank you for reading!