Objective: How can I wash my jeans?

Which of the following solutions is more sound in terms of naive physics reasoning?

OPT:
-- Place the jeans in the dryer with a cup full of detergent and press start on the machine..
-- Place the jeans in the washer with a cup full of detergent and press start on the machine..
Place the jeans in the washer with a cup full of detergent and press start on the machine.