Powerbutton gets stuck

My powerbutton gets stuck while pressed down, causing the phone to turn of and not wanting to turn on again. It is very possible that it is dirty… How do I go about cleaning it? Is there a tutorial? Any solvents or cleaning agents you can recommend?

I would advice you to clean the button with a tooth stick. You should not use any solvents (plastic and electronic parts can break).

Here is a tutorial from iFixit how to open the midframe and reach the power button:

Fairphone Midframe Replacement