Shampooing

Question

Dear R. Abadi, I recall that previously you gave details as to using shampoo on Yom Tov, specifically pouring the shampoo onto the hair and then rinsing repeatedly -no actual lathering or rubbing. In a recent post, you said that one could shampoo as usual on Shabbat (with the proper water temp). Is this a change in psak or am I misunderstanding? Thank you