at the beginning of each tray to help grasp the trays more easily... but it got to the point at the end of Tray 1 I didn't even need them.
It was easier to put the bottom tray back on after eating - still more difficult than with the end of Tray 1, but took mere minutes to snap it on, compared to last night!
I imagine (and hope) this will get easier with time. As my teeth move, the tray will be easier to get on and off... and maybe the more I experience this, the easier it will get even when I change trays.
One tray down, 36 upper and 18 lower to go!