I have recently bought 18â human hair extensions clip in from Remy, and I really loved it. However, I noticed that even though I have worn it just twice until now, it seems to look kind of worn out! Moreover, when I washed it out with plain water, and then air-dried it, it didnât look shiny as before. In fact, it is stinking now, and I am planning to use hair perfume over it. But before doing it, I want to know from some hair expert whether I should use hair perfume over it. I am afraid that it would ruin my hair extensions; therefore, I would like to get a proper advice from you guys, please help! Thanks.