Unbeknownst to you, time was halted for a couple of days. I know you consider slightly stale crisps to be "gone", but they are still broadly nutritionally identical, so you can still eat them. They just don’t crunch. If the crunch is important to you then a flash grill for only a few minutes will restore them to their former glory.
Are the walkers sensations lime and coriander poppadom bites crisps?