There are also amusing little tidbits of wisdom, for example, this one about cleaning your reactions using... spongeballs:
The use of sponge balls or scrubbing agents is also fairly common. They can provide a better cleaning actions than spray or mixing alone. However, it is important to ensure that the sponge balls will not disintegrate under your cleaning conditions. It's also a good idea to count the balls before putting them in to ensure that they all come out.