My all-purpose cleaner consists of:
- 0.25 L water
- 0.25 L distilled white vinegar
- 20 mL Dr. Bronner’s Sal Suds
I use this to clean my dishes, my shower, every surface in my apartment, and every part of my bike except the chain. About the only things I can think of that don’t get cleaned with this mixture are my body and my electronics. Previously I used a mixture of Bronner’s castile soap and water for all of these things, but Sal Suds is better at cutting grease. This makes it preferable for kitchen (and bike) duty. I saw no reason to keep two cleaners around, so I phased out the castile soap mix.
I mix this in a recycled 0.5 L glass bottle with a neck that has standard 28-400 threading, allowing me to add a sprayer. The half liter bottle lasts me roughly two weeks. A single batch costs me in the neighborhood of $0.25, meaning I spend somewhere around $6.50 per year to clean my things.
I go back and forth on the vinegar – sometimes I skip it and use 0.5 L of water instead. I don’t notice a difference in the cleaning performance, but I tend to use more of it when I skip the vinegar. Vinegar is an effective bactericide and, unlike with castile soap, there’s no harm in mixing it with the Sal Suds detergent, so I generally opt to put it in.
To measure the detergent I use an OXO Mini Angled Measuring Cup, which has proved a useful thing to keep around.