Ive made oil a few times and this has happened before where the oil has gotten very hard and brittle like and it also turned a dark color. Is this because i didnt purge good enough? When i did my run, i didnt have a heated plate of water under my dish but i did put in oven and whipped it up a bit right after i did the run. I have made oil before where it was nice and golden and a gooey like substance. What did i do wrong this time?