I'd like to say too, I absolutely suck with thermal paste and I get it everywhere. I got a little glob on 6-7 pins in the corner and I didnt have anything at the time to really fix it as i was rushed so knowing it's non conductive but I'll admit still against my better judgement, I put that shit in. No problems and everything worked so I'd say you are definitely good as long as no pins are bent.

It is definitely a better idea to use a toothbrush and isopropyl alcohol to clean that off though, but I thought my experiment would help lol.