~5 months and still bad

Hi guys english not my native so don’t be mad

For 4 months I use only water and to be honest all this time I don’t see any progress in less sebum secretion and then I thought that a good decision would be shave my head
So, I do it and it’s really did good(but not 100%) effect but recently I get dandruff and what I want to know - how counter this? can i hope that everything will pass with time?

I don’t want use eggs/clay/soda/vinegar
I also pretty sure that i dont have problem with guts health and eat enough nutritions(200 gr protein per day)