Pour the all purpose cleaner into a gallon container that can be sealed (a well cleaned milk jug will work), add the rubbing alcohol and enough water to make a gallon of solution.
To use pour into a spray bottle and spray onto shower walls/floor/etc after each shower (or after the last shower if more than one simultaneously). That's it!!! Will eliminate the need to scrub the shower weekly. I can actually go 6 months without scrubbing if done religiously. Works out about $2 a gallon and works better than the store bought brands!
