how do i get meters back up in fallout shelter once they're really low. also how do i get more lunchboxes without buying them?
Make sure you've got the dwellers with the highest points in a certain S.P.E.C.I.A.L. slot working in a specific room.
Send more dwellers out to gather resources to get caps, and use the caps to buy and upgrade the necessary rooms.
Use Rush as much as possible.
Stop dwellers having babies for the meantime, as they will consume more resources and exacerbate the problem.