My science project question (5th grade) is "What brand of toilet paper dissolves the fastest?" Why aren't any of the brands I'm testing (including Seventh Generation) dissolving when I put in water? After 12 hours, one sheet of the Seventh Generation hasn't changed at all!!! I don't know what to do to make this experiment work! Can anyone please give me ideas of what to use to maybe put in the water to help the toilet paper start to dissolve? I'm really stuck!