‘Sleep hygiene’ ‘digital hygiene’ and the increasing use of hygiene after everything

I get it but when did this become a thing? What happened to ‘sleep routine’ and ‘digital detox’? (edit: wrong phrase used, a better phrase would be sleep routine or bedtime ritual).

If a phrase ain’t broke, don’t fix it.

For some reason the use of hygiene after these words seems so pretentious and stupid.