I was recommended Bayer Provado Ultimate Bug Killer by a local (ish) nursery - and this is what I have used on my fuchsias and orchids indoors. It is a synthetic insecticide which is apparently safe to use on edible plants too. There is advice about it on the RHS website if you search.
Much as I would like to be able to use some of the products I have seen recommended on here - i haven't seen things like Neem oil available. You can use soapy water and rub them off, if you would prefer a lass insecticide way of dealing with the problem.