There are some key mistakes to dodge when using retinol. Don’t use too much at once. Start slow and increase the amount over time.Also, don’t put retinol on wet skin. Moisture can make it absorb too quickly and irritate your skin. Mix it cautiously with other exfoliants to avoid overdoing it.And, never forget your sunscreen during the day. Retinol makes your skin more sensitive to the sun. Protect it well.