Last I looked "rubbing alcohol" was also isopropyl alcohol as well. Of course, there is the 70% most commonly used but I should have stated 90% and if available 99% Anyone reaching for "wood alcohol = ethyl" may also do damage because it really attacks any adhesives/coating but plain alcohol doesn't in most cases. Overall, even ethyl alcohol is also called rubbing alcohol, so look for the higher % beyond 70%. Thes eare low cost general cleaners, if one looks for electronics cleaners specially for that task, then cost is much higher but cheaper than replacement if all was required is cleaning.
As for the original poster, while your problem no longer appears present, it *may* come back due to "humidity". Take note of that and also being an organic spill, could just as well start to fully attack(acid) the contacts over time and/or cause growth.