Q: How often should you use a foot file?
A: Once or twice a week is enough for most people. Filing more often than the skin renews leaves it sensitive rather than smoother.
Q: Should you file feet wet or dry?
A: Dry, or barely damp, for most files. Wet skin tears rather than files cleanly, which is why it is easier to take off too much in the bath.
Q: How do you use a foot file?
A: Work in one direction over the hard skin with light, even pressure, checking as you go. Moisturise afterwards while the skin is freshly smoothed.