Does anyone know where you can buy bicarb soda in bulk quantities? Seems expensive to buy the little boxes intended for use in cooking when you use it for cleaning.

Also - MantaRay said something on the first page about using vinegar for washing floors - what's the method for doing this? Just a dash in the mopping water, or quite a bit? I have just been mopping the kitchen floor with hot water, for DS's safety, but it doesn't really get it very clean-looking.