Bleach + ammonia "power mix"
Rex says
Rex Sterling, Ph.D. · Head of R&D, Clean Report · Meet Rex
"This isn't a stronger cleaner. It's a toxic gas you just made in a small, closed guest bathroom."
The science
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It makes chloramine gas.
Sodium hypochlorite reacts with ammonia to form monochloramine, dichloramine and nitrogen trichloride. All three are volatile and attack the eyes, throat and lungs.
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Ammonia hides in plain sight.
Many glass cleaners contain it, and urine breaks down into it. Bleach on an unrinsed toilet base or a just-wiped mirror can start the same reaction without anyone deciding to mix anything.
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It even cleans worse.
The reaction uses up hypochlorite, which is bleach's actual active ingredient. You lose cleaning power and gain a lung irritant. There's no trade-off here that comes out ahead.
Do this instead
One labeled product at a time. Rinse with plain water before switching products, run the bathroom fan, and keep the door open while you work.
Where this came from
From the Clean Report hacks libraryRob Benson (@BuckhornCliffs)
"Mix ammonia and bleach for the strongest deep clean."
twitter.com/BuckhornCliffs/status/2106897848495419863Archived copy on file: video/social/never-mix/download-14a5bd01bff2/
The archived video on file matches a pool-shock (calcium hypochlorite) claim from the same creator, not this bleach + ammonia sentence. The danger is real either way, but the link needs re-verifying.