I really don't understand how that toilet-seat thing made it so far in the competition. It's based on an idea that is total bunk -- flushing a toilet does not cause your bathroom to have any more germs floating around than can be found in the rest of the house. Those crazy kids on Mythbusters performed a well-designed experiment to test the idea that toilets spread germs, and they found it to be a myth. Whatever germs are in your bathroom come from the stuff just naturally floating in the air. Having a frequently used toilet in close proximity does not have an impact on the number of germs.
I admit that there are products out there that are based on disproven ideas -- air ionizers, anyone? But somebody on the show should've acknowledged that the product, if developed, would be preying on people's ignorance and germophobia.