Take them outside at least at night time. They need fresh air and light to recover. I had some renovations going on around the house with
maxima-aluminum so I had to move my plants away for a while and I even took some of them to my parent's house. Other than shower rinsing and a breeze as often as possible I don't know what you could do. An artificial light it's indeed very expensive but it's worth the money in such cases. I hope your plants recover shortly and they will not suffer from these constructions.
