Adding lactic acid back into my routine after tret adjustment

Hi all,I’m 34 and have been on tret 0.025% for about 9 months now from highstreetpharma. The initial purge and dryness have settled, but my skin still feels a bit dull on my off nights. I used to love lactic acid for keeping my skin soft and glowy, and I’m wondering if it’s worth bringing back into the mix. I was thinking of doing lactic acid once or twice a week, but I’m worried about over-exfoliating since tret already speeds up cell turnover. Has anyone else successfully reintroduced a mild exfoliant after their skin adapted to tret? If so, what’s your schedule like?