FWIW I don't get involved with a wet dry vac. I've no place to store one and I get so much fresh water in the bilge it is a weekly event if I want the bilge bone dry. My removal tool of choice, after the bilge pump, is a very good sponge. There are some unbelievable high capacity sponges out there. The sponge gets used everywhere on the boat, fits in the bucket, no electricity, no noise, no soap bubbles in the wet dry vac, very low tech, etc..
The humidifier cleaner sounds interesting, but does it cut grease/oil from the engine? I've never had a problem with the smell of Dawn, but then when I open the boat up after sitting the week in 90 degree heat, the last thing I'm going to be smelling is the Dawn detergent in the bilge. How does bleach reactwith with whatever the hoses and pump parts are made of and salt water? I don't think bleach is a real good grease cutter.
Anyhow like I said the watermen use Dawn, I'm sure not exclusively, but if you have ever seen the bilge of a watermen's boat that doesn't care what the bilge looks/smells like you would enjoy the difference.