How important is a drying aid or is it just a new technique to consume more product? I understand that it's suppose to add more lubrication to surface to help reduce marring, but before drying aids were used I dried my vehicles without one and I didn't mar the finish and this was when everyone used synthetic wool wash mitts and synthetic chamois to dry. I also know how they can add some quick and easy gloss and or slickness. To be honest my first car was black and it was my last black car had nothing that was not white or very light like silver since so I know how these colors conceal marring better. I don't mind using a detail spray just need to keep drying towels super clean so I can wash them in our nice new washer and dryer without worrying of leaving detailing chemical residue in the washer dryer. I have already tried using the laundry at and those machines are coated with softener and other dyes and soap fragrances and washing them by hand is just not practical for me.