Last my i5 3570K went hot at about 75 ° at a 20% load. I made a lot of worry and wondered why that could happen. After I screwed my PC again and the fan took, I noticed that from the cooler paste almost nothing was left previously.
I ordered this "syringe" to neuaufzutragen my heat paste again.
I wiped the old thermal paste with a handkerchief, both the CPU fan on the CPU alsauch away. That was not a great film, so went the almost without trace without detergent away.
I wore the kompeltte paste on CPU and CPU fan, it was a good film.
Now my CPU runs noticeable colder than before.
One should always have something ready, always on security still order one and put on page, you never know when you can use something :)
lg