What methods are introduced in How to Identify Witches? Try to write two.

The methods of identifying witches introduced in How to Identify Witches are:

1, always wear gloves, because they have no fingernails, only thin curved claws, like cats.

2. Real witches are bald and have to wear wigs. It is easy to get "wig rash" when the wig is directly placed on the bald head.

3. The nostrils of witches are larger than those of ordinary people, and the edges are pink and curved, like the edges of shells.