HomeOctober 31, 2026
Salt Can Clump in Humid Air, and Drying Sets the Lumps
Salt takes up water vapour in humid air, but lumps form when that moisture dries again. Impurity salts can make clumping start at lower humidity.
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The appliances, pipes, and wiring you live with every day, explained without a manual.
We explain the engineering quietly running inside appliances you already own, not which brand to buy next. Recent explainers include Salt Can Clump in Humid Air, and Drying Sets the Lumps and A Wet Towel Usually Helps Less Than Moving Air.
HomeOctober 22, 2026
A Wet Towel Usually Helps Less Than Moving Air
In freezer tests, moving air cut bottle cooling time by 60 to 70 percent, while a wet paper towel helped far less and sometimes not at all.
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HomeSeptember 29, 2026
PTFE Sheds Food by Offering Almost Nothing to Grip
The nonstick coating on your pan is a polymer discovered by accident in 1938. Here's what PTFE is, how it works, and what changed about how it's made.
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HomeSeptember 17, 2026
The Pan Makes the Heat, Not the Cooktop
The coil makes a magnetic field. The pan makes the heat. The cooktop surface stays cool. Here's the physics behind induction cooking.
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