Hi there, welcome.
Do you swirl and shake the jar lightly after adding the naphta? I believe the idea is for the naphta to "touch" every part of the basic solution that contains the spice. Most teks repeat the naphta pull at least 3 times to ensure all the spice has been pulled out of the mixture.
It sounds like you pull out mostly plant fats and oil, and just a little bit of spice. Try following any of the teks you find appealing in the
WIKI and share your results after.
Good luck, and safe travels.