I'm currently building my first PC, and I accidentally spilled some thermal paste on the pins of the M.2 connector. To clean it up, I used hand sanitizer with ethanol and a toothbrush, but now I'm hearing that I should have used isopropyl alcohol instead. I'm also finding it tough to remove all of the thermal paste from the motherboard. What's the best way to handle this situation?
5 Answers
It's important to know if your thermal paste is conductive or not. If it’s not, you’re probably fine! The main thing is to ensure that everything is clean off the connectors. Get some isopropyl alcohol and use that instead of hand sanitizer, since it can leave residues. If you can’t clean it all right away, it’s not the end of the world; just come back to it later when you have the right supplies.
Definitely switch to isopropyl alcohol, ideally 99%. It's way better for cleaning thermal paste. Just ensure that your thermal paste isn’t electrically conductive, which will make cleanup easier.
You can use isopropyl and a soft tooth brush to clean it up, but don’t worry too much if you can’t get every last bit of paste off. As long as it's non-conductive, it shouldn’t harm your PC.
Check what kind of thermal paste you used first. If it's mostly silicon-based, you should be okay even if it’s not 100% cleaned. Use isopropyl alcohol with a toothbrush, and just make sure to brush the area thoroughly to remove any trace.
As long as it’s not a conductive type of thermal paste, you're likely in good shape. Just focus on getting most of it cleaned up if it’s bothering you. I suggest using 90% or higher isopropyl alcohol for the best results.

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