After I finish using my camera in cold weather, I know I wrap it in a ziploc bag and leave it in my camera bag until it warms up (to avoid condensation), but I've been reading conflicting methods on how to do this. Do I put the camera and the lens (still attached) in one ziploc bag, or do I unattach the lens and put that in one bag and the body of the camera in another ziploc bag to warm up. thanks.