Make sure that you have pure acetone.
Cotton pads
You can use a brick file or a flat file.
Take the cotton pad and dip into acetone.
Simply wipe away at your nails until all nails are wetted down with acetone.(acetone will feel cool on your hands ad may burn on cuts or open wounds so please be as carful as possible.):)
Next swipe across your nails then one at a time.
Lastly wipe your hands with a damp wash cloth then add hand cream or oils to make soft and smell good