I did this for a bit. My barber lady commented how nice and healthy my hair was for the first time ever. Then I got a job that was too dirty to keep it up. Had metal dust on my scalp no matter how I tried cleaning with just water.

Added conditioner to the routine and that worked for that issue. Still no poo.

Sinclair Microvision MTV-1. It doesn’t work though. First released about 1978 according to Wikipedia.

Found it in a thrift store in a small town with a single stop light, in the middle of nowhere. That’s also where I got my sealed copy of Microsoft Flight Simulator 3.0 on 5 1/4 floppies. Total cost $7.