There was a lot of sticker residue on my plastic macbook, so I decided to use some goo be gone. It not only took the goo off, but it started taking the glossy layer off of the plastic. The plastic was literally melting in some places. I haven't used it since september, before my charger broke, and it has been out of warranty for a year and a half. It sucks, but I don't think any internal parts were damaged as a result. Now I'll know not to use this on any future laptops that I decide to put a sticker on 