Hello Dorothy,
Best is to get a clarifying shampoo that you can use once a week and avoid applying conditioner to your roots. Rather focus on your midlengths and ends. If you are using a styling aid, go for a light product meant for fine hair which usually doesn’t contain a lot of oils. This should help else you can rinse your hair with luke warm water and a half a cup of apple cider vinegar once a week to help regulate your scalp.