I recently purchased a screensavrz protector (nice little product), and I'm wondering if leaving it in there while i'm operating the pbook with the lid closed is a bad or good idea. It could be a good thing because it may shield the screen from the infernal temperatures emanating from machine. Conversely, it could be a bad thing because it may block whatever heat-dissipating airflow design is there. So I can't decide whether to take it out or not when running. Thoughts?