I managed to keep my nails but it wasn't easy. What happens is the nail bed holding the nail goes a bit bung. I used to carefully trim the nails right back so they couldnt catch on anything and leave them be. If they got dirt under them I would soak my feet or wash them to clean as best I could. It is a bad idea to put a nail file under there to clean as it will just lift the nail further. If you can hold on to your nails long enough the nail beds will recover and reattach. A year post chemo one toe nail will not grow nice and curved like the others, it grows in a vertical V which is annoying. I trim it as short as possible and file the top of the V down so it doesnt catch on bedding.