My mum was dead against hair washing as 'you'd catch your death of cold', and a bar of fairy soap - the dark green kitchen soap - was used, occasionally and with lots of cursing as I had long hair. There was a tube of Vitapointe - like ladies brylcreem I suppose - which could be used to stcik my fringe in place. Often I used fairy liquid as shampoo and as bubble bath....But washing hair any more often than once a week was asking for a row as it 'wasn't needed'. I think this was quite a widely-held view at that time, 1960s. I don't ever recall my mum washing her hair - she went to the hairdressers once a week for a shampoo and set, with a helmet-like perm every so often.
When I got to about 11 I used to buy little sachets of shampoo from the chemists, and me and my friends used to try all sorts, but I don't remember regularly buying conditioner until I was older, maybe the early 1970-s. I certainly remember the other girls in my class at school becoming frantic hairwashers in the early 1970s - it was when 'feathered' haircuts came in and I think the hair products industry went through a boom with all the Bowie-inspired cutting and colouring, and then the bubble perms that followed.