It's almost impossible to keep them straight! I was told off at the bank yesterday for the fact that I'd jammed the machine as my notes were not perfectly straight. £470 vanished and the machine shut down. I had to queue for an hour and then told I needed to be more careful with my cash. 
Any suggestions as to how to keep these new notes flatter? I don't often go to the bank but if I do, I'd rather have the option of using the quick machine.
Thank you