I've been pulling with pretty high quality cold pressed sesame oil for about 15 minutes each morning and I've notice that in the evening I can still see some yellow oil bubbles on my back molars and in between my teeth. I always rinse really well with warm salt water 3 or 4 times followed by brushing my teeth and drinking 2 or 3 glasses of water.
Any thoughts as to why this is happening and what might help?