When a container of powder gets low, I dump it into a new container of powder and roll it around for a while. So when the Unique plastic bottle gets low, I get a new bottle of Unique, pour in the remains of the old bottle, and shake and roll it to mix it up good. I've been doing this for years.
Some folks write about lots of powder varying, and figured that the mixing would take care of the variation. Now I'm not so sure.
What do you do?
joe b.

Use it all up and then go to the new stuff. Mixing powder is not good for several reasons one is some folks have mixed up two different kinds by mistake. 2. The older powder may be on the verge of breaking down or as you say the powder may vary and contaminate the new powder. 3. Just because for safety reasons I don't or would not. I know this may sound petty but it only takes one mistake.