Food 'Tube is the 17th episode of Sabrina's Secret Life.
When Salem uses a spell on Sabrina's clothes to get them quickly washed and dried (after he slept on them), it accidentally shrinks her jeans. She notices that they suddenly become tight for her; and starts exercising and starving herself. This causes her to lose concentration in class and she ends up with cafeteria detention. Salem then finally confesses to shrinking her jeans when he notices that Sabrina feels more and more tired. While on her second cafeteria detention, she dreams that she gets armed against General Cheesehead and his troops; who are trying to persuade her to eat healthily. But that dream becomes reality when she does get armed against General Cheesehead, who storms into the school and ties everyone up onto the ceiling, including Hilda and Zelda. Sabrina fixes the problem by learning her lesson...and having another cafeteria detention as punishment.