I started doing this and will never stop! My tub shower are always spotless-so simple. Simple shower and tub cleaner: fill wand half and half. Wet surface and scrub. wow! leave in shower wash while you are already in there.
This was our miracle cure last night! Alex didn't cough once after I have it to him. He has coughed once this morning. He told me "I am NOT doing that again", but after last night's results he will if I have to pour it down myself!