I did two batches of butane extraction with a lot of my vaped weed (still with plenty of thc on it, i only do a couple volcano bags per bowl). I ground up the vaped weed and used about 300ml of vector 5x refined butane. I purged it about 3 different times for 15 minutes each with hot water and burned off excess bubbles. I got oil, but it was very dark, almost black. There was plenty of THC oil, but also black sticky stuff. I used the honeybee extraction kit and the butane did not sit in the material for long. Any suggestions/advice? Thanks in advance.