What is the effect of using the wrong cleanser after fractional co2 laser?

Local wound care is important after fractional co2 laser. I would make sure to use non exfoliating cleansers, wash gently, and apply a soothing ointment to help improve the skin. In my practice, we often apply Elevase creams once the skin is epithelialized as it is an excellent ceramide based cream. Best, Dr. Karamanoukian Los Angeles

The best thing is to begin using a gentle non-fragrant, non-comedogenic cleanser as recommended by your physician, along with whatever moisturizing and sunscreen protocol you were given.  You've already noted the side effects of using fragrant and acidic cleansers, which is mostly irritation.  But, the irritation you've noted should improve.  If the red dots persist, or if you notice any issues with healing, then you should definitely follow back up with your physician for further recommendations.