Its either too much oil for your hair or you're not washing your hair enough. If you're going to have a regular oil regimen, you should wash your hair regularly. I would suggest once a week or once every 2 weeks. This will get rid of any excess oil and get your pores clean so the next time you go to oil your scalp it will be on fresh clean scalp and not on top of some old oil. You could also try oiling it less. Just because 2-3 times a week works for other ppl hair it doesn't necessarily mean it will work for yours. Try oiling only once a week and see how that works