Yes, one binder might be enough (we totally understand), but a few smaller binders make it easier to tote key binders around with you to appointments. Blogger A Bowl Full of Lemons stores hers upright and organized on her counter with the help of a dish organizer.
I tried this and the soap scum came right off. I'm completely impressed and no coughing from all the chemicals in cleaners. Never buying shower cleaner again. 1 cup each - warm white vinegar (microwave 2 min) + 1c Original Dawn. Spray, leave for 15 min, rinse.