This is probably a silly question but I need an answer from you guys, just to be sure. I removed a couple of days ago my heatsink from my CPU, because I wanted to test another CPU on my mobo. Afterwards, I placed the original CPU back to its socket and clipped the heatsink on it. I am using Arctic Silver 3 so my question is this. Was it necessary to remove AS3 from both the heatsink and the CPU and then re-apply it, or is it ok as it is?