Use hair dye for two applications
I was often annoyed that I had to pour so much of the mixed hair dye into the sink. It was always too much for the graying hairline, you can not pick it up, because it reacts chemically through the mixture.
Meanwhile, I always pick up the bottle from the last dyeing to mix, rinse well with cold water and let it dry.
At the next dyeing, exactly half of the new bottle comes in and half of the paint tube.
The other half of the new bottle and half of the paint tube end up in the fridge. Even the disposable gloves can be used again if they are rinsed with cold water and allowed to dry.
The manufacturers of hair dyes may not like to read. But it works fine!
