I use straight jojoba oil because I don't like the thick, heavy texture of castor oil and I'm concerned about the hexane used in the extraction process. As far as rinse goes after using oil, it kind of depends. I use jojoba oil every night to remove makeup (including eyes). Then I follow up with a cleanser around the face and leave the slight film around my eye area. When I do a longer OCM treatment (about once a week), I'll use jojoba oil to remove makeup first, rinse with tepid water, then use some more on my makeup free face and massage all over for about 15 minutes. Then I rinse off with tepid water, a microfiber cloth and follow up with a mist of toner before I continue with my other treatments.
Hope this helps,