If it is not causing any great problems, is it really necessary to bomb your plants with chemicals?
Remember, anything you put on your plant, you will end up smoking it too!
Best to look under the leaves, this is where the bugs will be hiding, and it is the safest and cheapest to just squash them, or throw them over the neighbours fence!
Neem is not as safe as it may seem either, in my country it is illegal to use neem on any product intended for human consumption.
Hope this helps,...........
Organoman.