A white hat, you say? For that you must journey to the highest peaks of Mount Kilimanjaro and extract the semen from the legendary two-headed unicorn, for its semen is the whitest and most pure cleaner in all the land. Then, and only then, will your white hat be clean.
Will you please stop filling the forums with bullshit!! Everyone knows that the two-headed unicorn is native to Nepal.
Nu uh! According to the twenty-third prophecy of Richard Simmons, it's in Tanzania upon the peaks of Mt. Kilimanjaro grazing upon the magical moonberries with the other uni-head unicorns!
^^ I always put a bowl upside down under the hat so it doesn't get too wrinkled and put it in the Dishwasher.
Once I saw a video thing at the Imax theatre on Mt. kilimanjaro with 3D glasses and everything. It would have been much better stoned but I was just a wee lad (10 or something) and did not know how magnificent weed is.