Decaying flowers

So there's an odd smell in the bathroom. I'm trying to work out if it's the carbolic soap, the bleach, the toilet disinfectant block thingy, the air freshener or an unholy alliance of all four. My solution? Whack some stronger smelling lemon bleach stuff down all the plugs, chuck a Harpic fizzy cleaning thing down the toilet, open the window and hope it doesn't all combine to form a toxic vapour that will drift merrily out the window and down the row of gardens, dissolving all the clothes on the washing lines as it passes.