General Fear explains the project to Congress.
The purpose of the program was to divide any number perfectly by zero, which would cause a massive thermonuclear blast to engulf all matter within the device’s 40 mile vicinity. Originally intended as a means to avoid press conferences, we have since adapted the product to serve as a personal hygiene cleanser. The detonator has been removed, and the manual trigger supplanted by a dense swath of multi-tiered bristles. The power source is still cold fusion, which is paradoxically extremely hot.
Put the power of a thousand Hindenburgs in your mouth!
We tested the Hydrogen Toothbrush on one thousand test subjects, and 99.9 percent of them did not experienced a critical reactor meltdown (this one guy, Phil Anderson, thought it would be funny to hit it with a rock. His family is suing us). However, the FTC requires that we include a warning label on all instances of this product notifying our customers that it may unexpectedly combust, incinerating you, your property, and your neighborhood. For best results, do not use within 40 miles of inhabited land. The Hydrogen Toothbrush is not meant for use on deciduous teeth. Do not expose the Hydrogen Toothbrush to magnetic or infrared devices. Roboshrub Incorporated cannot be held liable for rock-related detonations (you hear that, Anderson family?!).