Not Turning Off Lyrics

Lyric discussion by terri kaye 

Cover art for Not Turning Off lyrics by Spoon

Well it's definitely about insomnia, forced or otherwise. Ephedrine is a drug, a stimulant. Aluminum taste is from the beer can he's drinking from. The machine reference I think is vague on purpose. WHAT machine? I can think of a few, but I think that reference is meant to be eerie & mysterious.