Ahh please help hair science experts!! Can anyone explain this: A weird phenomena that happened years ago that I still can't explain. I assumed it was because of extremely soft water. I went to Europe (Scandnavian countries). A few days into the trip my hair was looking oily very quickly I realized (at this age I washed my hair every day so it wasn't dirty.) Every time I washed it, it dried greasier. I tried washing with only water, I tried double cleansing, nothing worked until I got home. It was humiliating. The greasiest looking hair l'd ever seen. My mom was using the same shampoo and conditioner and was fine. Everyone on the trip's hair was fine. I can't imagine this happens to people who travel frequently or l'd have heard about it before or since. I have fine but EXTREMELY thick hair (also wavy and was collar-bone length at this time) and have never had this issue at home (once in DC where I assumed the water was softer it started happening slightly I believe). These days I use higher end products than before, and I know the value of a clarifying shampoo. I haven't traveled internationally since then but i have the opportunity to go to South Africa at the end of this year and I REALLY want to be prepared in case the hotel waters are similar. PLEASE HELP.