Dell Chromebook 11 CB1C13

Okay I have two of the same model Dell Chromebook 11 CB1C13 l managed to get one working and powerwashed it, the problem is with the other, both were enrolled in local school and I can't get into developer mode, keep getting message the admin has disabled dev mode, is there a way to get through this? Any advice,ideas or comments are appreciated, what else is possible? thanks