Without hair straightening products, and having to wash my hair,help???

Ok I need to straighten my hair like the question title above, how can I straighten my hair with great results to last all day?Yes I use hair spray, and I wake up at six, considering all the things I have 2 do in the morning before school, I just don't have enough time to take a shower, bath, or worry with straightening products.Yes I have a straightener, and I hae kinda thick, wavy hair.Answer quickly please =^.^=Without hair straightening products, and having to wash my hair,help???
Obviously take showers at night. Try drying your hair a bit, so its somewhat straight, and easier to work with in the morning. Right when u get up, turn your straightener onto the temperature that works on your hair. Then separate your hair into sections (use a clip to put up the top layer of ur hair and then straighten the bottom section. After your finished with that, let down the top section of your hair and straighten it.) After that, spray a little hair spray in it, and it should be fine. this takes me 15 mins and thats when my hair is crazy!Without hair straightening products, and having to wash my hair,help???
You may well do this already, but all I can think of is to section it with crocodile clips, and work up your head through the layers of hair, doing each one as you go... works for me, but then again my hair isn't thick :\