I think we all use the 3 in 1 for our orchids at some point, but you need to change things up. The 3 in 1 is systemic, so the bug has to bite it . Bugs will become immune to it in a short time, as they evolve fast. I would go with the alcohol to start with, and try soaps ( including insecticidal soap) which breaks down their waxy coating. The most important thing is to use whatever on an ongoing basis because you wont get all the bugs and their eggs in one shot. Keep it up and watch until there is no sign of them. Good air circulation is the best prevention, as it keeps the adults at bay.
