I'm willing to try out the oil cleansing method (the one with 25%castor oil and 75% olive oil). I live in Spain where olive oil can be found literally everywhere. It doesn't happen the same with castor oil, it's really impossible to find locally and if available it's ridiculously expensive, so much that using that OCM would be more expensive than any cream or product in the market. My question is, can I substitute castor oil with something else?