He nui ake te pH waikawa atu i te kiri o nga tiaki whakamohoatanga. Heoi, ahakoa ko te Night Reboot he serum exfoliating, tona pH = 4, e kore e matara rawa atu i te pH o te kiri (pH kiri = 5.5). Mo te whakamahine me te whakaene i te whaihua, ko te Po Reboot me nui ake te pH waikawa atu i te kiri.