What works, on what, why — and whether it is safe.
The chemistry behind cleaning, and what the evidence supports. Where no authority has established that something is safe, you are told so plainly — because “nobody has reported a problem” and “this is fine” are not the same statement, and treating them as one is how people ruin worktops and hurt themselves.
Tell the advisor what the item is, what is wrong with it and what it is made from.
Three things you have probably been told that are wrong
“Oxygen bleach is the wool-safe bleach”
The wool industry body advises against both kinds.
Does not work
“Never use soap on cast iron”
The manufacturer says the opposite, and explains why the rule outlived its soap.
Does not work
“Natural cleaning products are gentler”
The UK regulator lists that belief among the myths it exists to correct.
Does not work
Explore
Things to clean
Ovens, showers, sofas, stoves, irons, worktops, cars — and the parts of them that need different treatment.
Stains & problems
Grease, limescale, soap scum, mould, wax, wine, marker, road salt. What each one actually is.
Materials & surfaces
Marble, stainless steel, wool, grout, plastics, anodised aluminium. Most safety rules live here.
Cleaning agents
What each one does, what is in the bottle, and which surfaces it ruins.
Tools & equipment
The half of cleaning nobody writes about, and the half that does most of the damage.
Methods
Soaking, abrasion, descaling, extraction, sweeping — and why the order matters.
The science
Surfactants, pH, chelation, hardness, static, biofilm, contact time.
Hacks & claims
Traditional and viral techniques, assessed rather than repeated.
Guides
Ways in, by room, material, problem, product — or because you want to understand something.
Chemical safety
What must never be combined, and what to do if it already has been.
When the obvious answer is wrong
Where the treatment that removes the problem would destroy the surface.
Laundry & fabrics
Care labels, fibres, and why the bleach question comes before the temperature one.
Never mix cleaning products
Use one, rinse thoroughly, then use the other. Most serious domestic chemical injuries happen to people who did not think they were mixing anything — because one product was not rinsed away before the next went on.
What must never be combined, and what to do if it already has
The questions most sites skip
Limescale dissolves in acid. Marble also dissolves in acid — they are the same compound, which is why the descaler that clears one destroys the other. There is no clever chemical answer, and a page that recommends vinegar for a marble shower has simply not asked what the shower is made of.