I had a funny experience at Kamm2cut Pappelallee. I've booked and paid for wash and cut. Therefore I didn't wash my head right before going. At the shop what I've got instead was keratin spry and a simple cut. I didn't ask for the reason because I had an appointment right after and on Google reviews I've read you have to pay extra for a simple dry. It felt a bit funny to leave the shop with indeed the cut I wanted but dirty hair! XD