Urban acorn leaching suspends the bag inside the toilet tank; they are ready when the flush water comes out clear.

Some say you should start hot water leaching with cool water to avoid temperature "shock" that "sets" the tannic acid making it harder to leach out. Once the first rinse water has come to a boil then later rinses can also be hot, according to this school of thought.

Acorn has a good but robust flavor and stands up well to other strong flavors like garlic, onion, bacon, etcetera.