Here I am again with a fifth See me once riddle. Have fun finding the answer!
see me once, I'm taped together as a twist.
see me twice, used by both chef and geologist.
see me once, icky sticky but everywhere in use.
see me twice, my subjects I like to abuse.
Although the answer has already been found, here is a hint. (For the people reusing this riddle. Answers here do not have to include this hint - but feel free if you want to):
see me once, some people like to inhale
see me twice, eat me fresh or else I go stale