The Caroline Hirons Method, in a Logbook: Cleanse, Acid, Hydrate, Treat

If you’ve read anything about building a skincare routine in the UK, you’ve met Caroline Hirons’ framework — even if you didn’t know it by name. Cleanse, acid, hydrate, treat: a sensible order that takes the guesswork out of layering. Her book, Skincare: The Ultimate No-Nonsense Guide, is where to go for the full, properly-explained version. This isn’t a substitute for it — it’s a companion: how to log the method so you can see how your own skin responds.

A quick disclaimer: this is an independent explainer of how to track a popular framework. It isn’t endorsed by Caroline Hirons, and nothing here is a medical claim.

The framework, briefly

The order, in plain terms:

• Cleanse — properly, usually twice in the evening if you’ve worn SPF or make-up.
• Acid — an exfoliating acid (AHA/BHA) on the nights you use one, not every night.
• Hydrate — your hydrating layers: essences, serums, whatever your skin likes.
• Treat — your targeted steps and, crucially, moisturiser to seal everything in. SPF every morning, without fail.

It’s deliberately flexible. The art is in the frequency — how often you acid, where you slot a treatment — and that’s exactly the bit worth tracking.

Where it’s easy to slip

The framework is simple to understand and surprisingly easy to muddle in practice. The acid and treat steps are where most people come unstuck: acid too often, an active piled on the same night, two exfoliating things without realising. Your skin gets cross, and because you weren’t keeping track, you can’t tell which overlap caused it.

That’s not a failure of the method. It’s a gap in the record.

Logging each step

You don’t need to log a paragraph. You need to log frequency and reactions, because those are the two things memory mangles:

• Tick the steps you actually did each morning and evening — including the nights you skipped the acid because your skin felt sensitised.
• Note how often you acid. Over a fortnight, “twice a week” and “basically every other night” look very different on paper — and feel very different to your barrier.
• Flag reactions against the step. “Tight after acid + retinoid same night” is the kind of note that, a month later, explains everything.

Tracking tolerance over weeks

The framework rewards patience. Acids and treatments need weeks, not days, to show what they’re doing, and the same window applies to working out your right frequency. A log lets you nudge things deliberately — acid twice a week, then three times if your skin’s happy — instead of randomly, and lets you see the effect of each change rather than guessing.

For the broader habit of recording a routine — what to note, how to photograph progress — see how to track your skincare routine. The principle is the same; this is just the cleanse-acid-hydrate-treat version of it.

An honest note

A logbook won’t replace understanding why each step is there — that’s what Caroline’s book is for. What it will do is turn the method from something you follow vaguely into something you can see working (or not) on your own face.

That’s all DewLog is: a quiet way to log the method, take a weekly progress photo in the same light, and read your skin’s response back over the weeks. No ads, no affiliate links, nothing to sell you. Log the framework, give it a season, and let the record tell you how your skin takes to it.