I've got the same problem as you Moy. True really annoying! I tried different brands of shampoo but it didn't help at all. I even tried nizoral, quite expensive, finished the whole bottle but still the same. Actually I was thinking to ask my family to send me sachets from the Philippines :-)
At the moment, I tried baby oil but still not completely gone. I dont know what to do now. But I will try some of the posts here, might help. So thanks also for those who shared.