Even if your ad-hoc cleaner combo isn’t dangerous or toxic, you can never be sure what effect two products can have on a surface or fabric when combined. Always read the warning and ingredient labels on cleaning products — and never mix these:
1. Drain cleaner + drain cleaner
Use one product according to package directions (typically, only half a bottle is needed per treatment). If it doesn’t work, don’t try another product. Instead, call a plumber!
2. Baking soda + vinegar
Baking soda is basic and vinegar is acidic so when you put them together you get mostly water and sodium acetate. Also, vinegar causes baking soda to foam up and if stored in a closed container, the mixture can explode.
3. Hydrogen peroxide + vinegar
Combining these two products creates peracetic acid, which is potentially toxic and can irritate the skin, eyes, and respiratory system.
4. Bleach + vinegar
The combination sounds like it’d be a powerful disinfectant, but the two should never be mixed as together, they produce chlorine gas, which even at low levels, can cause coughing, breathing problems, and burning, watery eyes! Oh no 😦
5. Bleach + ammonia
Bleach and ammonia produces a toxic gas called chloramine, which causes the same symptoms as bleach and vinegar — along with shortness of breath and chest pain. Many glass and window cleaners contain ammonia, so never mix those with bleach.