HI,, IF you can take houseplants outdoors and Hose them off first and that will get rid of quite a few,, then put a few drops of dishsoap in a spray bottle full of water and spray really good for a few days,, works for indoor and out door plants,, spray for a few day to be sure you got them all,, at least that is what I've done and seemed to do the trick.
I have also done that in an end- hose sprayer for in ground plants.
Lets us know if it worked for you.
btw I used Joy dish soap and always keep a bottle in my gardening supplies for just this purpose :wink: