Yeah, I've done this on a PC that was in a flood, but you have to let the CPU dry and even then, I had a heatgun to warm it up after leaving it for 48 hours, worked fine afterwards, but with thermal paste, all you need is a little bit of rubbing alcohol and a paper towel, I mean every one if different. Half the time if the paste isn't al hard and dried up, I just wipe it off real good, don't even need alcohol and I've never had problems doing it that way.
If you never tested it yet, leave it sit for 48 hours and heat it up with hair dryer if you have one, don't need it crazy hot, but hot enough to try and evaporate the moisture, I'd even leave it sit in front of a fan and rotate it different positions every couple of hours and it should be alright.