Make navbar home button always clickable... remove active state

My home button loads a website in an iframe. So if you click around the website inside the iframe I want to be able to click the home button again and reload homepage of the website. The problem is the home button is now active (after the first time you press it) and non-clickable. How do I set the state so it is always clickable and loading the website homepage even if I am already browsing in the iframe?