In the crudest "file" could be rubbed off more skin.
Therefore, it takes a bit-with a little patience works out the whole thing very well.
However, there are quite a lot of dust, of course rumfliegt spite of the protection in the bathroom.
In true professional equipment of this dust is sucked with.
Please note:
Instead Chiropodists simply do it by myself.
Lighter than said than done.
On their own feet one never sees as much as anyone else.
The outside of your own two feet you can not see very well without experience in yoga !!
So may be made up to second and maintain mutually .... or do a little gymnastics :)