Fingernail soft cloth and cleaning alcohol some thermal componds can be removed using only a soft cloth just be sure to use nothing that will scratch the base of the heatsink.
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The early bird gets the worm, But the second mouse gets the cheese.
Use Arcticlean 1 & 2 and scrape off most of the thermal paste with a plastic credit or ID card... and use Que Tips with number 2 to clean the chip face to a mirror finish.
Then use Arctic Silver 5 to apply new paste. Apply with a blob in the centre of the chip and then spread evenly with your plastic id card .... do not use your fingers......
Hope this helps ... late but better than never!!!! Cheers Shane