I'm in the same boat, aiming for the same time frame. I feel your pain and frustration. I don't think we are allowed to instruct you on how to do anything here, goes against the rules I've read. I know that isn't very helpful. I don't think the plastic bag will work, I've tried similar, I simply ended up ripping off the bag once it got too warm and full of my own air. If you were asleep you would likely rip off the bag as a reflex while still sleeping. What is the urgency for you? I have similar dates upcoming and each day is painful but curious what you are dealing with as well.