I mean 'treating' them - as in exfoliating, extracting, slapping on a clay mask and scrutinising them for open pores, acne and wrinkles.

Those wearing the clay mask were significantly worse at tasks that involved remembering emotions.

It's a wash-off cleanser and light clay mask all at once.

There are now some great versions of the old-fashioned clay mask - good for drawing out bacteria.

For a deep clean, apply an oil-absorbing clay mask weekly.