Dropping a small fortune on a well-stocked grooming cabinet is made slightly more bearable by knowing you’re going to get a good few month’s worth out of what’s inside. But if like Joe you’re getting through lotions and potions faster than Usain Bolt through chicken nuggets, chances are you’re using too much.

If this expensive habit is leaving you with nothing but shrapnel in your pocket, use those coins as a guide to how much you should be using in the future.

For hair products, the principle starting point is a 10p-sized amount. Of course, whether your hair is longer or shorter than average affects whether this needs to be adjusted up or down.

With longer hair, work up incrementally until you find the exact amount you should be using. It’s worth keeping in mind that you might be using the wrong product altogether if piling it on isn’t getting results.

As for face products, the amount required differs across the routine. A 10p-sized amount of face wash is sufficient, as overdoing it can dry out the skin. The same goes for moisturisers – beyond that it’s likely your face won’t be able to absorb it. For serums, you can reduce down to a pea-sized amount thanks to its thin, oily nature.

Guys that suffer from dark circles should invest in an eye cream and apply a 5p-sized amount across both eyes, covering both underneath and on the eyelid.

Meanwhile, those with facial hair should also be using a beard oil. Aim for a 5-10p sized amount depending on the length of the beard, but avoid rubbing it into your skin if you can, as the thicker nature of the oil can cause spots.

Got it? Good. Now turn those coins into cash by stocking up less frequently.