It's crazy huh?
Let's see if we can't work out the kinks...
Did you rinse the oil with warm (sorta hot) water?
If you ever tried to wash oil off dishes you know the temperature of the water matters.
What kind of oil did you use?
Some light oils are meadowfoam, jojoba, sunflower
Do you poo? I can't remember if you're lo/no poo.
If you poo try a heavily diluted poo after the oil before the conditioner. By
heavily diluted I mean take an empty 16-24 oz water bottle add a cap full of poo, about 3 oz of water, shake to combine, then fill to the top w/ more water and pour hair.
The last one will probably get you the best results, but if you're no/lo poo then try the first two.