hi! do you use the aha/bha toner twice daily? maybe it could be a bit too much for your skin since the cosrx cleanser already has bha in it. try to replace the toner with a more hydrating toner and use the aha/bha one twice a week for starters? Isntree has a nice basic but hydrating toner you could try to incorporate into your routine. they also have a really soothing green tea toner you could try too. I’ve read Tiam snail and azulene essence is great too for sensitive skin. I’d say focus on hydrating and repairing your skin barrier first before exfoliating your skin. look for products that have ingredients like beta-glucan, glycerin, centella, panthenol, niacinamde, etc. for moisturiser, I find the one from benton really soothing and at the same time moisturises my skin too. has a gel cream texture so it’s not heavy on oily skin. as for serums, the iunik one helped me when my skin was red and irritated. I hope these helps you 💕