So my LG G3 screen started to fade after a couple of seconds of using it I tried to fix it by putting pieces of a credit card or a folded paper underneath the CPU and on the motherboard connectors, It worked for a couple of days but now the problem came back so I searched for a better solution I found out that you can add a copper layer on top of the CPU to work as a heat-sink but since I dont have a thin layer of copper tape I thought about using an aluminum foil, will it work? is it safe to use? and I also thought about putting a thermal compound that I use for my PC (MX-4) on top of the piece of credit card and underneath the aluminum layer, will it help? and is it safe?