Six guides, each leading with the part most advice leaves out: what ruins the thing, what is genuinely dangerous, and what a product does not do. There is no seventh, because the seventh would be a page nobody reads.
GuideWhat not to mixThe household combinations that are genuinely dangerous, and what the labels mean.GuideAcid, alkali or disinfectantNearly every cleaning problem is one of three types. Matching them is the whole job.GuideWhat ruins a stained itemThe four mistakes that turn a stain into a ruined thing, whatever you spilled.GuideWhat vinegar ruinsThe jobs it is genuinely good at, and the surfaces it destroys permanently.GuideWhat baking soda does not doFive jobs it is good at, and the ones it gets recommended for wrongly.GuideWhich kind of damp you haveCondensation, penetrating or rising. The treatments differ and getting it wrong costs.