For a effective home manicure/pedicure try using "Dovobet ointment" (Calcipotriol/betamethasone). Rub it into your hands, feet, cuticles and especially where the skin meets your nails. Leave it on thick. You can also use a light abrasive. Do this right before bed and cover it with mittens and socks while you sleep.
When you wake up take a shower and notice the big difference. There is one catch, Dovobet ointment can be quite expensive.