It is not dangerous, but I can think of many better ways to rinse the mouth.
It is dangerous if you swallow it but just getting some into your mouth is fine. I'm sure it tastes awful. rinse your mouth out with water and mouth wash and make sure to spit it all out and not swallow.
rinse in cold water before washing in warm soapy water
no, never! Use hot soapy water then rinse them in warm water.
Soapy water is not particularly dangerous. If a person drinks enough, it will trigger vomiting. That will solve the problem.
You wash the item with clean, hot soapy water then rinse or wipe clean afterwards.
Not usually. Rinse the item immediately in cool water. If the fabric allows, leave it in cool soapy water overnight. Rinse and launder.
soak in hot soapy water for at least 5 min. rinse thoroughly..
During a rinse cycle, after the soapy wash water has been removed.
Water down the car, scrub it down with a washing brush and some soapy water, rinse it off, then dry it off.
Rinse the mouth out with clean water.
Bleach and hot water, rinse in hot water and then wash in hot soapy water.
To clean outdoor furniture cushions one can use warm and soapy water. Rinse well with water and allow to dry in the sun.