Wipe away most of the thermal paste that you can and then use 99% Pure IPA to clean away any residue. Avoid using rubbing alcohol, which is just 70% IPA. I like to use KimWipes as they leave very little lint..
Considering this, do I need to remove old thermal paste from CPU?
Yes, you should always remove/clean the old thermal material when changing the heatsink and apply new thermal compound(as a general practice). As previously indicated, this prevents voids/gaps/bubbles/poor seals.
Also, can I remove thermal paste without alcohol? If you don't have any alcohol, use the toughest paper towel you can find. Do not wipe from the outside in, wipe from inside out. So opposite of butt wipes. This is to prevent the paper towel from snagging on the corners and causing a bunch of fibers to go flying all over the heatsink.
Furthermore, how do you remove dried thermal paste?
if you want to remove thermal paste from the CPU or GPU then you should just use a simple cotton cloth or coffee filter dipped in rubbing alcohol or nail polish remover. Just gently wipe the thermal paste away from the processor and be careful to not to leave any fibers on the processor.
Can I use alcohol wipes to clean thermal paste?
You can use isopropyl alcohol to remove remaining thermal paste from a CPU surface, but you want to make sure you are using a lint free cloth/paper to do this. You can use isopropyl alcohol to remove remaining thermal paste from a CPU surface, but you want to make sure you are using a lint free cloth/paper to do this.
Related Question Answers
Can I use nail polish remover to clean thermal paste?
Isopropyl alcohol would work well, even in 91% concentration a Nail polish remover contains acetone but also a bunch of other stuff you don't want as a residue on your heatsink. It's better to use 91% IPA even if it is 9% water by volume, dry it off gently and dust off lint after removing the old paste.Does thermal paste expire?
It depending on the solvents used in the making of the compound which may dry over the years, and not the thermal paste. This is not a reason to get stressed as the paste is still going to do its job, even when the inner substances are dry! So, there is no reason to replace the dried thermal compound.Can you use hydrogen peroxide to clean thermal paste?
Hydrogen peroxide is good for killing organic stuff(which is why it hurts when you put it on a cut) but it probably won't do much more than water in this situation. Isopropyl alcohol is like $. 50/bottle and it'll clean better than H2O2 will(and it'll evaporate a lot faster).What happens if you use too much thermal paste?
If you put too much, it actually acts as an insulator, which is the exact opposite of what you want. In the worse case scenario, you can overheat and damage components. The point of thermal paste is to provide a medium to increase the thermal conductivity between your CPU and the base of the heatsink.Can I use 70 isopropyl alcohol to clean CPU?
70% isopropyl alcohol will just take a little while longer to evaporate, make sure the CPU is completely dry before you replace the heatsink.How much thermal paste is too much?
Putting too much paste on a socket generally won't hurt thermal performance, because the act of tightening down the cooler squeezes out the excess. Too little paste is bad, but anything above the minimum threshold will have the same effect once the cooler is tightened down.Can too much thermal paste kill a CPU?
Too little or too much thermal paste is not good. If the thermal compound is too thick, it will not even out between the CPU and heatsink. That means that the heat conductivity will be done by the thermal paste, not by metal on metal contact of the IHS and heatsink.Can you just wipe off thermal paste?
To remove the TIM, first wipe the surface with the dry cloth to remove as much of the big chunks as you can. Then apply a small amount of alcohol directly to the cloth; while not as important when working with the heatsink, it's still a good idea to avoid making a mess.What happens if you don't replace thermal paste?
What happens if you don't have thermal paste? Things don't work as efficiently as they should. Your CPU's operating temperature will be higher. It may need to slow itself down (thermal throttling) to stop from overheating and failing.What happens if you don't remove old thermal paste?
Yes. The reason is that when you remove the heatsink, the seal between the chip and heatsink is broken that was previously made by the thermal paste. By leaving the old thermal paste on, you run the risk of capturing air bubbles between the two when re-seated, which will cause drastically higher temperatures.How long can thermal paste be stored?
A lot of people have a rule of thumb of three years, but there are plenty of thermal compounds that will last over five, as long as it is properly stored.What can I use instead of thermal paste?
Mix half teaspoon of toothpaste and mucaine in the vacuum-packed container. To enjoy substitute of thermal paste, you can keep it in the fridge. Make use of Vaseline (petroleum jelly) and blend it with toothpaste. Now take a syringe to fill it with the mixture and then you conceal it on the heatsink.How do you remove thermal adhesive?
if you can, then to remove the residue, try using isopropyl (rubbing) alcohol that you can buy at any pharmacy store. use a cotton ball or something and dab it and rub it on heatsinks to dissolve the adhesive residue. then it should evaporate.Can I use acetone to remove thermal paste?
Not enough to shift thermal grease. Acetone will leave a slight residue on the metal surface, and as you are aware, will melt most plastics. It will be fine to use as long as you apply it to the cloth and then wipe with that.Can I clean CPU with alcohol?
Cleaning/Reseating your CPU This can be done with isopropyl alcohol and either cotton swabs or a cloth. Once the CPU socket and surrounding area have been properly cleaned, reinsert the CPU chip and apply some fresh thermal paste directly onto the top center of the chip.Can I use 91 isopropyl alcohol to clean electronics?
IPA 99% is safe and effective for consumer use to clean personal computers and electronic devices. Isopropyl Alcohol 99% is the best substance to use for this purpose. Isopropyl Rubbing Alcohol 91% may also be effective, but it is best to use the purest IPA available. 
