My gp prescribes a 50:50 parrafin wax: parafin oil whichis meant to be used daily. It does help with hard skin, but I find it too messy not not always well adsorbed - I buy flexitol heel balm and flexitol moisturising foor cream and use one or the other once a week which I find better. I occasionally need to use a podiatry supplied foot file on the balls of my feet if there has been a build up of hard skin but wouldnt use it on my toes where I think the skin is thinner and therefore probably more prone to damage