Blackheads aren’t dirt. They’re oxidized sebum trapped inside a pore that’s open to the air. That’s why scrubbing harder does nothing — and why The Ordinary Salicylic Acid 2% Solution exists. It’s a $7.70 serum that promises to dissolve the glue holding dead skin cells together, letting the pore drain naturally. I tested it for 8 weeks on a T-zone […]