And the worst part is nobody tells you until you've already messed up a bunch of clients. I was doing 25% TCA peels on everyone for like 8 months thinking I was giving them amazing results. Then this one gal's face turned bright red and stayed that way for two weeks. Her esthetician friend finally told me I was basically burning people. Now I use 10-15% and my clients look way better with way less drama. Take this with a grain of salt but I honestly think a lot of us start out too aggressive because the products make it sound like stronger is better.

My old foreman always said a lucky day beats a perfect one because you can't screw it up.

That reminds me of my uncle who ran a small auto shop for 30 years. He had filing cabinets FULL of paper invoices stacked up to the ceiling. One time the power went out for three days during a storm and he was the only shop in town that could still work because he had all his customer info on paper. Meanwhile every other shop was stuck waiting for their computers to come back. He never switched to digital after that.