This button removes the HTML formatting tags; abbr, acronym, address, b, big, blockquote, cite, code, del, em, font, i, kbd, pre, s, small, span, strike, strong, sub, sup, u.

It processes the selected text and replaces it with the format-free text.

Here is the button code:

js:
E.replaceSelection(E.getSelection().replace(new RegExp('</?(abbr|acronym|address|b|big|blockquote|cite|code|del|em|font|i|kbd|pre|s|small|span|strike|strong|sub|sup|u)(\\s[^>]*)?>', 'g'), ''));

Hello. Thank You for very

Hello.
Thank You for very cool editor. I'm try to use this recipe to clean up formating, but it does not remove test
I'm try to add |p after |u , but this removes only last tag , can you help me?

This removes the tags inside

This removes the tags inside the selection. That may be the issue with yours.

Under supervision of Drupal :)