I added a custom oil but, by mistake, I entered the wrong sap. I should have guessed that the “sap”entry box is for KOH sap, but I entered the NaOH sap. I noticed the delete option, selected “delete,” got the ”confirm delete” option in red, selected that option and then nothing happened. The custom oil is still there. I’ve tried it a few times and also waited 24 hours to try again before posting this message.