Unwanted heat is a problem for all hydraulic systems. Even a well-designed system operating at top efficiency converts about 20% of its input power to heat. An inefficient system, or one poorly ...

After testing seven different popcorn makers, I found the best one for each type, whether you want a stovetop model or an air popper.

We've put together a guide on "gentle," "permanent press," "normal," and more. This is which dryer settings you should be using for your clothing, bedding, and linens.