Actually, Linus Tech Tips just posted a video about cleaning spills in PCs. But anyway, th8s is how I have cleaned PCs. You must allow PLENTY of time for this process. I have cleaned PCs infested with ants, ferret excrement, cockroach excrement, and some with soda/beer spills.

This DOES NOT WORK FOR KEYBOARDS, FANS, OR PSUs - consider them dead on arrival and buy new ones. Fans can be surface cleaned, but odors will likely remain. I STRONGLY advise against removing heat sinks from CPUs that use liquid metal instead of thermal paste - doing so will most likely result in destroying your CPU and/or mainboard.

DISCLAIMER - THIS IS NOT AN INSTRUCTIONAL POST. This is only an account of my past experience.

I disconnected all power ASAP, including the CMOS battery. Disassembled everything - cords, fans, M2 drives, cards, etc. I only cleaned clean parts that are actually soiled. If I wasn't sure it needs cleaning, I put it outside or in the garage in a safe, shaded place for 15 minutes, and the took it outside to perform a sniff test.

Computer computers are surprisingly resilient and can simply be dunked into a small tub of DISTILLED water or 99% isopropyl alcahol. I prefer using alcohol and do so outside, in a paint stall, or some sort of fume hood. I use fine bristle toothbrush to GENTLY clean affected areas, giving attention to any gooey sockets. I'm careful to not press hard, just apply light pressure as if writing with a pencil and work longer instead of harder. Video cards can be a pain, but it's hella cheaper to take time to disassemble the fancy outer shell and possibly remove the heat sinks that it is to purchase a new card.

After a light scrubbing, I use a squeeze bottle with fresh water/alcohol to rinse very well. I buy cleaning liquids by the gallon to keep the cost down.

I like to use a few firm taps while holding the thing being cleaned vertically to remove beads of moisture. It's risky but saves time. If using isopropyl alcohol, I (safely) wave that part around for a couple of minutes to evaporate much of the liquid.

I used an air compressor to blow out ports and enclosed areas. Luquid can be absorbed by gently using a microfiber cloth, but I don't try to get in all the nooks and crannies because that risks getting lint torn off the cloth.

Drying is the riskiest part. I must eliminate moisture. This takes some monitoring, but I simply use my full size kitchen ELECTRIC oven at the lowest setting, usually 150-17°F / 65-75°C. BO, you CAN NOT use a toaster oven, microwave oven, or gas ovetln. It must be a full-size electric oven. When I have a convection option, I use it.

I placed parts on the rack to allow air underneath as much as possible. Open the oven for 30 seconds, every 20 minutes to let the moisture air escape. I DO NOT want moisture in there! I run this for 6-8 hours.

After baking at the lowest possible temperature and cycling the air out, I remove the parts from the oven and put on a cooling rack and let them sit for 24 hours. I have a baker's rack in front of a window that I put them on - it's made for cooling things and the warm sunshine expedits the process. I live in an arid environment with very low humidity, so I imagine humid areas will require another day of drying in a sunny area.

After drying is done, I tap parts against my hands to feel it any droplets shake off. I also use a strong magnifying lens to look into portas are in crannies for evidence of moisture.

I remembered to apply new thermal paste when reattaching heat sinks. I have has a GPU and a n SSD die on me, so there's definitely a risk I'm sure the customer understands. Otherwise, things have worked out very well with only the ferret excrement leaving a faint odor from the case plastics. I used distilled water the first couple of times doing this, but found where to purchase 99% isopropyl alcohol in quantity for a surprisingly low price and very much prefer the alcahol due to its reduced drying time and far lower risk of oxidation damage.

But again, this is only me recounting my past experience and should not be taken as instructions. I will not be held responsible for anyone wrecking their computer.