One day I realized that the last 10% of the shampoo bottle lasted at least as long as the first 90%. I suspected this was because most of the time I was using too much shampoo but as I neared the end of the bottle I used a more appropriate amount.
How could I trick my brain to always use the appropriate amount?
Thus was born the “shampoo bottle protocol”. I now have a second shampoo bottle that I use to refill my primary shampoo bottle. When refilling the bottle I never fill it more than 10%, therefore I’m always using shampoo at the slower burn rate.
I like to joke that, “I have saved literally tens of dollars over the years thanks to this technique.”
In addition to the financial savings, I appreciate that I’m generating less waste. On top of all this, I just enjoy the fact I’m tricking my brain.