Can I get as good of results from the LaserComb if I don't use the Activance? It caused some redness and mild burning on my skin the first time I used it.

Also it's not always convenient to have to wash my hair prior to using the LaserComb because of the time it takes to style my hair afterwards. I prefer to wash my hair just twice weekly, not the three times weekly I use the LaserComb. Why does the hair need to be freshly washed? Is it to wash out hair spray and other hair products or is there another reason?