I used to think I had sunscreen figured out. I owned a bottle, I put it on most mornings, and I assumed that checked the box. It took a dermatologist appointment and a fair amount of reading to realize I was making almost every mistake in the book.

Not using nearly enough
The amount most people apply is a fraction of what’s needed for the SPF on the label to actually apply. For your face and neck alone, that’s roughly a quarter teaspoon, which looks like a lot more than it sounds. I was using maybe a third of that.

Only applying it once
Sunscreen isn’t a one-and-done morning task if you’re outside for more than a couple of hours. It breaks down with sun exposure, sweat, and touching your face. I never reapplied, ever, which meant my protection was basically gone by early afternoon on sunny days.

Skipping it on cloudy days
Up to 80% of UV rays pass through clouds. I used to treat overcast weather as a free pass and skip sunscreen entirely, which meant a lot of unprotected exposure I didn’t think I was getting.

Ignoring my ears, hands, and the back of my neck
My skincare routine stopped at my jawline for years. The number of small sunspots I’ve developed on my ears and hands says a lot about how much sun exposure those areas quietly got.

Assuming makeup with SPF was enough
A foundation with SPF 15 sounds like protection, but the amount of product people actually apply is nowhere near enough to reach that SPF level in practice. I was relying on this as my entire strategy for a long time.

Fixing these didn’t require a fancier product. It required actually using the one I already had, correctly and consistently. That’s been a bigger factor in my skin looking better over the last year than any serum I’ve bought.