I had replaced the thermal paste from my CPU a few days ago and am now noticing fluctuations in temperature. Before the re-application, my CPU would run at 34 C while watching videos and running a Skype call. Upon replacement, my CPU runs at 36 C idle. When in use for web browsing, temps will increase to 37 C, 42 C, drop back to 37C, then to 34 C, and raise again to 40 C. This process occurs withing a span of seconds and repeats often.
The paste used before and after the change was Arctic Silver 5. I applied a pea-sized amount and spread the paste using the heat sink. The heat sink is making direct contact with the chip, and the fan is operating normally. When removing the paste, I used generic tissue.
What could be resulting in these inconsistent temperatures?