Spot clean with the mild soap solution and rinse.

Surface tension of soap solutions for different concentrations.

A physical model of a catenoid can be formed by dipping two circles into a soap solution and slowly drawing the circles apart.

Using the soap sudsy solution, Bray shook each egg, dipped it into the water, and held it up to the light.

Then distilled water is used to wash away the soap solution of the oily substance.

"Turn on the gas at the tank and brush a 50-50 water and soap solution on all the connections," he said.

If you're squeamish, spray them with a Safer's soap solution.

Like other types of Go stones, yunzi are washed and dried using a gentle soap solution to remove any dust from the packaging/manufacturing process.

Planes of soap solution have the property that only three can intersect along an edge at an angle between them of 120 .

The CO2 gasses cause the soap solution to bubble up.