As stated above there is more than one way, that being said I would suggest you can do it without the tape, you can clamp on the side of the hood also, just make sure you clamp the plastic on the outside of the hood. Even if you clean the hood first the tape may come down, especially if you spray allot of water. Once that happens you can't put it back up. I also would not use that much plastic, this will be hard to explain but if you cut the plastic the length of the hood including the sides, pull the front cormer of the plastic up on the side. (I may even pull the front corner of the plastic up and clamp it to the ceiling if possible) if you can't clamp to the ceiling simply pull the front corner of the plastic up to the ceiling and clamp where it meet the bottom of the hood, letting the excess hang down. This creates a natural funnel toward the center, you won't have to do so much gathering to clamp it to what you are funneling to. Same effect almost half the plastic, the front of the hood remains open. I find this to be easier to work with instead of working through holes in the plastic, my 2 cents.