Best method to get rid of mealybugs (and maybe scale too)?

I've got an indoor stephanotis which got an infestation of mealybugs (bad soil I think). I gave it a spray of Safer 5118-6 insecticidal soap (49.something% potassium salts of fatty acids) and have been going around (and around and around) the plant with an alcohol soaked pad to pick them off. It's a pretty thick mess of vines, and after several days of hunting I've found a lot, but of course it needs to be zero. It's had a problem with scale as well in the past, but this seems to be pretty minor right now. I've encountered just 2-3 leaves with that, and alcohol-wiped them too.

So my question is, is this insecticidal soap the most suitable thing to use (it does specify it targets mealybugs) or is there something better? I plan to give it a good saturation in a couple more days, really try to hit every spot.