Isopropyl Alcohol 91% at the drug store is the first solvent to try. It used to be you could only find it at 70% but now almost every grocery store I look at has it at both 70 and 91%. After that, try acetone but it is VERY damaging to plastics. It is circuit board safe except for plasting wrapping on electrolytics, plastic bodied film caps, and plastic terminal blocks, in general. Other heavy duty solvents inlcude stuff like MEK that you can buy at the hardware store, but these are very very strong and have health risks.
For me, if IPA and acetone won't do it, I go looking for specialized solvents. The last time I made a mess with super glue, I tried both with no success and then went and bought the specialized super glue remover from Duro, and it worked like a charm. So if the above fails you, look for specialized products. I hate to see people resorting to anything stronger than acetone like MEK (methyl ethyl ketone).