Hello everyone!
I started reading these threads over a month ago, I confess I've not reached the end, I started at the very beginning and I'm now on thread 7, still chugging away. Would've liked to reach this thread with a triumphant entrance declaring I'd read EVERYTHING, but..er.. I haven't sorry. Also I wish I'd made notes, why didn't I make notes?!
Anyway, I've always had oily skin, congestion, bit of acne but not too bad. Skin like a rhino, not sensitive to anything. But lately my skin is dehydrated, especially right under my eyes, it's really dehydrated there and making my wrinkles look awful. All crepey and deep. I'm 33, I shouldn't look this old 
I started using PC BHA last year. Added in the AHA at some point early this year (the bottle says twice a day! I did not do it twice a day!) but didn't like the gel AHA texture so stopped. Discovered double cleansing, and for the past few months been using BS Camomile balm, and Una Brennan Vit C oil. Both I like and it really made a difference to my oily skin, but my skin now feels tight afterwards. Use the Vit C oil in the morning and both in the evening. SPF 50 every day.
Been using products from the Ordinary for a couple of months, did not know what I was doing until I found this thread and sorted out my routine.
AM-
Cleanse with Una Brennan Vit C oil
TO Vit C suspension- love this doesn't pill and texture doesn't bother me
TO Buffet
Olay Total Effects day moisturiser
SPF50, currently boots sultan, horribly greasy. Biore is on the way from japan.
PM
Double cleanse, BS camomile butter, Una Brenna Vit C Oil
PC BHA, currently on the Resist version, will go back to Clear when it runs out I think
HA, really like this, think it's helping with the dehydration
Also add in one of these 1-2 times a week each-
Lactic Acid 10%- much prefer this to the 8% glycolic from PC I was using
Azaleic acid- can't get on with this. Whereever I place it in my routine it pills horribly. Like PVA glue on my face. Also really drying.
Niacimin- I seem to be reacting to this!
Olay total effects night moisturiser and/or boots face oil. Think it's a botanics one.
Since starting acid last year I think my skin has become sensitive to the Olay moisturisers, it stings when I put them on. Stupidly I've ignored my face stinging, 'I don't have sensitive skin' I thought to myself. I even repurchased when they ran out 
Now that I've tried the Niacimin from TO I realise it's that ingredient that I'm sensitive to. That also stings, a lot. And makes my face red, sore, and bumpy.
Could the sensitivity to niacimin and my relentless perseverance with it have caused dehydration?
What would you recommend I do to tackle the dehydration particularly around my eyes? Heavy creams don't feel right, I've been using a face oil, and even my daughters eczema cream but no joy.
I'd like to try one of the AB hydrating toners. A bit confused which one to go for, and I didn't write down the name/names. Can someone point me in the right direction?!
I'm snail curious, I've looked at the CosRX one, and Benton. I'm considering buying one and using it in place of the olay moisturiser. Or maybe I should go back to basics and try toleriane? I'd like to try the dermo cleanser too, I'm almost out of BS camomile.
I've been really good and not bought anything the entire time I've read these threads, now I need to get moisturiser, cleanser and something to sort hydration and I'm getting giddy. Talk me down. I've got 3 shopping baskets open in different online stores, with different products. Is serozinc worth it? nope don't answer that, tell me to stick to moisturiser, cleanser and hydration!
I do have a recommendation though- I've been using CheekyWipes cloths for double cleansing. I have the bamboo velour ones, and they're so soft. Really lovely. Small though, but that means you can't do any aggressive whole face scrubbing like Caroline Hirons. I definitely recommend them.
Oh and Loreal Elvive Low Shampoo, it's fab. No conditioner needed.