Dont let the subject fool you, or foil you I am playing with words to get your attention. THe question is this:

Do I keep the foil on? Face it out or into the wall?

Truthfully I was going to peel it off just want to make sure that I am not ruining anything before I do so. Thanks!!!!!!!!!!!!!!!!!

If you wish to maintain high frequency reflection and prevent too much deadness in your room you can leave the foil on facing the room. I understand that the foil facing also improves bass control slightly. Removing the foil will make the material more absorbant at hi and mid frequencies. Removing it may be preferred to facing the foil toward the corner.