I have found an independent local olive oil producer who is willing to give me (!!!) about 18 liters of olive oil. I have a bucket with a hermetically seal-able lid that was previously only used for olive oil. How can I make sure it's clean enough for this new oil? Wash well with soap and hot water? Disinfect with alcohol? If alcohol, is 70% okay? Can I use a clean alcohol-soaked rag to clean the inside of the bucket - or is spraying it on better? This amount of oil will probably be in the bucket for quite a few months (I'm a hobbyist soap maker.)