I thought I'd shut down my Air last week and put it in its sleeve. When I got to my workstation this morning and took it out, the computer was dead as a door nail. I plugged in the power adapter and it started and charged through the morning. On closer inspection this evening, the usual 'shut down' commands don't shut the machine down. A press of any key 'wakes' it back to the login screen. My guess is that the MBA was 'on' in the sleeve for several days and finally ran out of power sometime before I got to work this morning. To be clear, this isn't my only machine. It's a 3-week old 2018 MBA, 16/512. I've tried all the usual remedies (SMC, etc) without success. Waiting 5 or 10 minutes produces the same result: Touching any key 'wakes' the MBA to the login screen. Even holding down the Touch ID button doesn't work ... whenever I touch any key on the keyboard, the machine 'wakes' back up. Does anyone have any ideas why this machine won't shut down?