I have been helping someone clean out their home, which had become a hoarders retreat! There were gnats and spiders everywhere. I would spray myself with the lavender spray to repel them and it worked. I was also spraying my face with eyes open, to make sure I breathed this into my lungs!!
After each visit to the house I'd spray even more in my face because my eyes burned from all the dust. WELL..... about 2 weeks into this new habit, I noticed my face just glowed. My skin was good but now its great! So that was the " side effect" to keeping myself bug and dust free!! :)