Walk into almost any bathroom, beauty counter or YouTube tutorial and you'll spot at least one of these. Not because people don't care, but because nobody ever flagged them as mistakes in the first place. They sneak in early, become habit, and quietly dull every look you put together. Here are the five I notice most — and the small fixes that make an outsized difference.
The Ones That Keep Coming Up
Skipping the expiry date. Makeup has a PAO — that's the Period After Opening symbol, the little open-jar icon on the packaging with a number inside (12M, 24M and so on). It tells you how many months a product is safe to use once you crack it open, and it matters more than most people realise. Old mascara and liquid liner are the ones to watch most closely: past their shelf life they harbour bacteria and can cause eye irritation or infection. Foundation and concealer that have turned tend to separate, smell slightly off and sit unevenly on skin. The fix is brutally simple: flip your products over, check the symbol, and actually throw things out when the time's up.
Not cleaning your brushes. Brushes pick up oil, dead skin cells, old product and bacteria with every single use. When you press a dirty brush to your face, you're pushing all of that back into your pores — and that's a reliable route to clogged skin and breakouts. A quick clean once a week with a gentle brush cleanser or a small amount of mild shampoo in lukewarm water, then a proper rinse and reshape before air-drying, is genuinely all it takes. Sponges need it even more often; aim for every few days if you're using one daily.
Rushing moisturiser. Moisturiser needs a moment to sink in before foundation goes on top. Apply too soon and you're essentially dragging a wet, tacky surface around with your brush or sponge — foundation sheers out unevenly, moves, and doesn't grip. Wait until your skin feels comfortable and no longer tacky, usually two to three minutes, before reaching for your base. If you're using a serum underneath, add another minute or two for that to absorb first. It's the easiest prep step and one of the most skipped.
Matching foundation to your hand. Hands are almost always a different tone to your face — more exposure, more washing, different levels of pigmentation. Testing a foundation shade on your wrist or the back of your hand is one of the most persistent beauty habits, and it leads directly to that dreaded tide-mark at the jawline. Always swatch on the jaw itself, in natural light, and look for the shade that disappears into the skin rather than sitting on top of it. When in doubt at a counter, ask for a sample and wear it for a few hours before committing. Blending your everyday base that lasts starts with the right shade — nothing else compensates for a mismatch.
Going too heavy with powder. A light dusting of powder to set base and manage shine is useful and very effective. Loading it on — swipe after swipe, pressing it thick into the skin — is a different thing entirely. Too much powder settles into fine lines, exaggerates texture, and gives skin that flat, chalky finish that somehow reads as ageing even on very young faces. A fluffy brush, a light hand, and pressing rather than dragging will set your makeup without the overdone effect. If you need a midday touch-up, focus only on the genuinely shiny spots: the centre of the forehead, nose, and chin.
None of this requires new products. It requires about three fewer habits that never served you in the first place.
How They Make Each Other Worse
These mistakes tend to compound. Rushing moisturiser makes powder look worse; the wrong foundation shade gets emphasised by over-powdering; dirty brushes muddy the colour payoff of any shade, right or wrong.