removing great stuff foam from rear deck

i built a custom carpeted board on the back of my rear deck in my car for 4 6x9 speakers. i foamed the bottom of it to seal off holes into my car so the air from my subwoofers wont get in my car. a little foam got onto the carpet of the rear deck and on the carpet of the board and i dont know what to use to get it off. i tried "goo gone" but it didnt work, it only got the foam off of my fingers. any insight?

I would try nail polish remover. Try it in a small spot first to make sure it doesn't hurt the carpet.

According to the side of the Great Stuff can, they reccomend acetone.  I have no idea if this is for cured foam or for when it is still wet.  Acetone is the primary ingredient in Finger nail polish remover.  It is just a lot more economical to buy acetone.  As stated above try a tiny spot to make sure it does not discolor the carpet.