BEFORE trying with tools, it is possible to get the cap off as well as the inner part of the toothbrush without any tools. This will not damage the toothbrush; actually it will possibly save the toothbrush from being marred.

Simply push the metal head at the top of the tootbrush downwards into a hard surface with some force and the bottom cap and the inner part will pop out by itself.

This works on both old and new Sonicare models.

If this worked for you, simply skip Steps 3–6.