I've read on various forums. That this product was very effective in cleaning electronic contacts. I read also that he would successfully solve the problem of home button on the iPhone 4. Well it's true, the product is really miraculous he revived the home button on my iPhone 4 (which almost ended recycled), I still can not believe my eyes or my thumb! The phone looks like new. So I recommend 100% for those with a reactivity problem with their iPhone button.
