The deflate flap section on my SynMat UL 7 came free, and is now not attached. This happened accidentally, but I am now happy with this little snafu. My mat deflates quicker than before and that little flap doesn't keep the moisture in as much as it used to. It is still in there after a couple of days, but is a lot easier to manage.
As Dan mentioned earlier, I have also tried the rolled up paper towel trick and it worked, although arguably being a minor nuisance. I now am happy with my accidental mod and find it to be adequate in mitigating moisture inside my pad.