indoor peppers

Two are doing great. One even has produced fruit!

But the last one I pulled out of the garden at end of season, is looking diseased. I found sign of small white insects on the underside of the leaves. Wiped them all off with rubbing alcohol and rinsed well in soapy water. Lots of yellow residue on the paper towel. Not good. The insects don't seem to be reappearing, but it still looks sick. I don't think I can save it- this one is destined for the trash.