I am using Paulas Pore Normalizing Cleanser before I put on my BHA (morning) or AHA (night) but I have read that the BHA or AHA won't be as effective if the cleanser has a high pH (Above 5.5).
not sure but I actually bought a couple hundred ph test strips, I got them from amazon but you can get them cheap at a pool supply place - handy to have on hand and you can test your products yourself
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