Bread is a stapleware, as such it needs to be eaten. Keeping the bag open for easier (tactical), time-critical access is a thus a necessity.

Because of that? Not that I know of. From it being much past the best before date of course.

I tried the rubber band. I tried the clip. Neither work.
Only the fridge does. And that works well enough. I either tuck it, or I take it all out and keep it on a tray. Open. If I keep it for long enough to make it dehydrated, it's my fault.