I first saw regrowth (esp temples, at the start I Wass Norwood 3+, now I', almost Norwood 1) only after my scalp in dieseased segments had became very different:
1) well-peeled: Nizoral 2% initially helped a lot with removing dead skin lesions but Wass insufficient for me to see a regrowth of normal (not thin baby) hairs. Absence of regular proper peeling impedes minoxidil absorption etc. Usually I once a week I must be sure that at least some tiny pieces on dead skin are removed from my temples area (most difficult to regrow in my case). I have to wash my hair every day, even if it looks completely clean and non-oily. It's completely normal for a man to wash his hair daily it won't make your hair worse if done properly. First I use a Vichy shampoo to get rid of dirt, minoxidil that I use before bed + to compensate for aggressive effects of nizoral etc. Then I use nizoral and keep it for 15 minutes until it dries (I tried to keep it for 2-3 minutes and my scalp worsened in a week). Then mint conditioner. I also use a gently hair peel one a week - it's up to you to identify a right peel so as to get a gently peeling without burning your scalp.
2) non-oily skin: my skin is generally oily despite nizoral. Only when it's dry I see a rapid healthy regrowth. I take zinc sulphate (zincteral TEVA 124 mg) four tablets per day. It's a lot. Two tablets per day are insufficient in my case to avoid oily skin. I do not have zinc deficiency. First I completed a generally recommended course and stopped, hoping would be enough. Despite all things being equal I started to see more oily skin and lost about 25% of my temples regrowth.
3) colour: I saw regrowth only when the ocular of my scalp (temples) became the same as in my donor area - pale white with slight blue-green undercolour. Without zinc and sufficient nizoral use my skin became more reddish. Not necessarily reddish - it simply looked like my face skin. I saw regrowth only then my temples scalp differed in colour from my forehead. A slight variation in nizoral, zinc etc produced a ski colour I my temples area (that used to e before treatment) I lost my regrowth I this area. Now I have all my regrowth back.
4) texture: when I see regrowth my scalp is very smooth and a bit puffy, when I was loosing my regrowth my skin became slippy and firm (as used to be before treatment).
5) hair root volume: when I started to loose my progress my hair seemdto have bee losing root volume - pores were not clean enough for my hairs to 'stand' firmly out of them. When I enjoy regrowth my hair is vertically detached from my scalp rather than stick down to my scalp.
Also:
1) in my case I have to literally use minoxidil every day twice daily (Roigaine In the morning + 15% minoxidil and 5% azelaic acid solution before bed) preferably at the sometime intervals. When I missed some in the morning or evening just for a few days - I lost some ofmy regrowth in 2-3 weeks. Now things are good and with every morning wash I can see not more than 5-10 hairs lost. And these are long (old) hairs, not short therapy-produced hairs.
2) oral antibiotics affect your digestive system (I had to take some due to my tooth condition) and absorption of nutrients. A three-day course was tough for me to loose some of regrowth inn 1-2 weeks. The same happened when I ruined my stomach with excessive use of aspirin for headaches on a few occasions.
My point is that there are many more variable that can affect your success despite being on the big three. Hope this may help.