Dry or cracked feet:

for dry and cracked feet, petroleum jelly over night, cocoa butter, coconut oil are very useful, put any of these on feet after washing them, your feet will be soft and cracks will be gone. 

put your feet in water for a while, clean your feet with a towel to take out dry skin, and then put any of the above  overnight, clean your feet again in the morning with water and put a good moisturizer.

try to wear socks all the day out, so that feet will not be exposed to dryness, and in a month feet will be presentable, beautiful.

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