I mentioned using water a couple weeks ago on the OPs spider mites post. I believe OP mentioned in another post that repeatedly touching the plant may have led to further issues experienced.
With aphids you're still going to have to wash them off which will get rid of them. Just killing them with something and not washing them off leaves dead bugs and their crap behind. Spider mites are going to be more difficult to eradicate by just spraying with plain water.
Yes exactly, hence me writing a couple times that using water to wash the aphids off might be the way to go. Depending how far along the plants are and the level infestation they may not even need anything...